28307720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:367

約数の個数: 128

約数和(自身を含む): 81388800

約数和(自身を除く): 53081080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 19, 20, 28, 34, 35, 38, 40, 56, 68, 70, 76, 85, 95, 119, 133, 136, 140, 152, 170, 190, 238, 266, 280, 313, 323, 340, 380, 476, 532, 595, 626, 646, 665, 680, 760, 952, 1064, 1190, 1252, 1292, 1330, 1565, 1615, 2191, 2261, 2380, 2504, 2584, 2660, 3130, 3230, 4382, 4522, 4760, 5320, 5321, 5947, 6260, 6460, 8764, 9044, 10642, 10955, 11305, 11894, 12520, 12920, 17528, 18088, 21284, 21910, 22610, 23788, 26605, 29735, 37247, 41629, 42568, 43820, 45220, 47576, 53210, 59470, 74494, 83258, 87640, 90440, 101099, 106420, 118940, 148988, 166516, 186235, 202198, 208145, 212840, 237880, 297976, 333032, 372470, 404396, 416290, 505495, 707693, 744940, 808792, 832580, 1010990, 1415386, 1489880, 1665160, 2021980, 2830772, 3538465, 4043960, 5661544, 7076930, 14153860, 28307720]

約数ペア:

[(1, 28307720), (2, 14153860), (4, 7076930), (5, 5661544), (7, 4043960), (8, 3538465), (10, 2830772), (14, 2021980), (17, 1665160), (19, 1489880), (20, 1415386), (28, 1010990), (34, 832580), (35, 808792), (38, 744940), (40, 707693), (56, 505495), (68, 416290), (70, 404396), (76, 372470), (85, 333032), (95, 297976), (119, 237880), (133, 212840), (136, 208145), (140, 202198), (152, 186235), (170, 166516), (190, 148988), (238, 118940), (266, 106420), (280, 101099), (313, 90440), (323, 87640), (340, 83258), (380, 74494), (476, 59470), (532, 53210), (595, 47576), (626, 45220), (646, 43820), (665, 42568), (680, 41629), (760, 37247), (952, 29735), (1064, 26605), (1190, 23788), (1252, 22610), (1292, 21910), (1330, 21284), (1565, 18088), (1615, 17528), (2191, 12920), (2261, 12520), (2380, 11894), (2504, 11305), (2584, 10955), (2660, 10642), (3130, 9044), (3230, 8764), (4382, 6460), (4522, 6260), (4760, 5947), (5320, 5321)]