21205440

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:259

約数の個数: 168

約数和(自身を含む): 75285600

約数和(自身を除く): 54080160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 37, 40, 45, 48, 60, 64, 72, 74, 80, 90, 96, 111, 120, 144, 148, 160, 180, 185, 192, 199, 222, 240, 288, 296, 320, 333, 360, 370, 398, 444, 480, 555, 576, 592, 597, 666, 720, 740, 796, 888, 960, 995, 1110, 1184, 1194, 1332, 1440, 1480, 1592, 1665, 1776, 1791, 1990, 2220, 2368, 2388, 2664, 2880, 2960, 2985, 3184, 3330, 3552, 3582, 3980, 4440, 4776, 5328, 5920, 5970, 6368, 6660, 7104, 7164, 7363, 7960, 8880, 8955, 9552, 10656, 11840, 11940, 12736, 13320, 14328, 14726, 15920, 17760, 17910, 19104, 21312, 22089, 23880, 26640, 28656, 29452, 31840, 35520, 35820, 36815, 38208, 44178, 47760, 53280, 57312, 58904, 63680, 66267, 71640, 73630, 88356, 95520, 106560, 110445, 114624, 117808, 132534, 143280, 147260, 176712, 191040, 220890, 235616, 265068, 286560, 294520, 331335, 353424, 441780, 471232, 530136, 573120, 589040, 662670, 706848, 883560, 1060272, 1178080, 1325340, 1413696, 1767120, 2120544, 2356160, 2650680, 3534240, 4241088, 5301360, 7068480, 10602720, 21205440]

約数ペア:

[(1, 21205440), (2, 10602720), (3, 7068480), (4, 5301360), (5, 4241088), (6, 3534240), (8, 2650680), (9, 2356160), (10, 2120544), (12, 1767120), (15, 1413696), (16, 1325340), (18, 1178080), (20, 1060272), (24, 883560), (30, 706848), (32, 662670), (36, 589040), (37, 573120), (40, 530136), (45, 471232), (48, 441780), (60, 353424), (64, 331335), (72, 294520), (74, 286560), (80, 265068), (90, 235616), (96, 220890), (111, 191040), (120, 176712), (144, 147260), (148, 143280), (160, 132534), (180, 117808), (185, 114624), (192, 110445), (199, 106560), (222, 95520), (240, 88356), (288, 73630), (296, 71640), (320, 66267), (333, 63680), (360, 58904), (370, 57312), (398, 53280), (444, 47760), (480, 44178), (555, 38208), (576, 36815), (592, 35820), (597, 35520), (666, 31840), (720, 29452), (740, 28656), (796, 26640), (888, 23880), (960, 22089), (995, 21312), (1110, 19104), (1184, 17910), (1194, 17760), (1332, 15920), (1440, 14726), (1480, 14328), (1592, 13320), (1665, 12736), (1776, 11940), (1791, 11840), (1990, 10656), (2220, 9552), (2368, 8955), (2388, 8880), (2664, 7960), (2880, 7363), (2960, 7164), (2985, 7104), (3184, 6660), (3330, 6368), (3552, 5970), (3582, 5920), (3980, 5328), (4440, 4776)]