661131520

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 216

約数和(自身を含む): 1879041024

約数和(自身を除く): 1217909504

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 83, 98, 112, 127, 128, 140, 160, 166, 196, 224, 245, 254, 256, 280, 320, 332, 392, 415, 448, 490, 508, 560, 581, 635, 640, 664, 784, 830, 889, 896, 980, 1016, 1120, 1162, 1270, 1280, 1328, 1568, 1660, 1778, 1792, 1960, 2032, 2240, 2324, 2540, 2656, 2905, 3136, 3320, 3556, 3920, 4064, 4067, 4445, 4480, 4648, 5080, 5312, 5810, 6223, 6272, 6640, 7112, 7840, 8128, 8134, 8890, 8960, 9296, 10160, 10541, 10624, 11620, 12446, 12544, 13280, 14224, 15680, 16256, 16268, 17780, 18592, 20320, 20335, 21082, 21248, 23240, 24892, 26560, 28448, 31115, 31360, 32512, 32536, 35560, 37184, 40640, 40670, 42164, 46480, 49784, 52705, 53120, 56896, 62230, 62720, 65072, 71120, 73787, 74368, 81280, 81340, 84328, 92960, 99568, 105410, 106240, 113792, 124460, 130144, 142240, 147574, 148736, 162560, 162680, 168656, 185920, 199136, 210820, 227584, 248920, 260288, 284480, 295148, 325360, 337312, 368935, 371840, 398272, 421640, 497840, 516509, 520576, 568960, 590296, 650720, 674624, 737870, 743680, 796544, 843280, 995680, 1033018, 1041152, 1137920, 1180592, 1301440, 1349248, 1475740, 1593088, 1686560, 1991360, 2066036, 2361184, 2582545, 2602880, 2698496, 2951480, 3373120, 3982720, 4132072, 4722368, 5165090, 5205760, 5902960, 6746240, 7965440, 8264144, 9444736, 10330180, 11805920, 13492480, 16528288, 18889472, 20660360, 23611840, 33056576, 41320720, 47223680, 66113152, 82641440, 94447360, 132226304, 165282880, 330565760, 661131520]

約数ペア:

[(1, 661131520), (2, 330565760), (4, 165282880), (5, 132226304), (7, 94447360), (8, 82641440), (10, 66113152), (14, 47223680), (16, 41320720), (20, 33056576), (28, 23611840), (32, 20660360), (35, 18889472), (40, 16528288), (49, 13492480), (56, 11805920), (64, 10330180), (70, 9444736), (80, 8264144), (83, 7965440), (98, 6746240), (112, 5902960), (127, 5205760), (128, 5165090), (140, 4722368), (160, 4132072), (166, 3982720), (196, 3373120), (224, 2951480), (245, 2698496), (254, 2602880), (256, 2582545), (280, 2361184), (320, 2066036), (332, 1991360), (392, 1686560), (415, 1593088), (448, 1475740), (490, 1349248), (508, 1301440), (560, 1180592), (581, 1137920), (635, 1041152), (640, 1033018), (664, 995680), (784, 843280), (830, 796544), (889, 743680), (896, 737870), (980, 674624), (1016, 650720), (1120, 590296), (1162, 568960), (1270, 520576), (1280, 516509), (1328, 497840), (1568, 421640), (1660, 398272), (1778, 371840), (1792, 368935), (1960, 337312), (2032, 325360), (2240, 295148), (2324, 284480), (2540, 260288), (2656, 248920), (2905, 227584), (3136, 210820), (3320, 199136), (3556, 185920), (3920, 168656), (4064, 162680), (4067, 162560), (4445, 148736), (4480, 147574), (4648, 142240), (5080, 130144), (5312, 124460), (5810, 113792), (6223, 106240), (6272, 105410), (6640, 99568), (7112, 92960), (7840, 84328), (8128, 81340), (8134, 81280), (8890, 74368), (8960, 73787), (9296, 71120), (10160, 65072), (10541, 62720), (10624, 62230), (11620, 56896), (12446, 53120), (12544, 52705), (13280, 49784), (14224, 46480), (15680, 42164), (16256, 40670), (16268, 40640), (17780, 37184), (18592, 35560), (20320, 32536), (20335, 32512), (21082, 31360), (21248, 31115), (23240, 28448), (24892, 26560)]