28377280

素因数分解:

$2^6\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1249}}^1$

素因数の和:1337

約数の個数: 56

約数和(自身を含む): 68580000

約数和(自身を除く): 40202720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 142, 160, 284, 320, 355, 568, 710, 1136, 1249, 1420, 2272, 2498, 2840, 4544, 4996, 5680, 6245, 9992, 11360, 12490, 19984, 22720, 24980, 39968, 49960, 79936, 88679, 99920, 177358, 199840, 354716, 399680, 443395, 709432, 886790, 1418864, 1773580, 2837728, 3547160, 5675456, 7094320, 14188640, 28377280]

約数ペア:

[(1, 28377280), (2, 14188640), (4, 7094320), (5, 5675456), (8, 3547160), (10, 2837728), (16, 1773580), (20, 1418864), (32, 886790), (40, 709432), (64, 443395), (71, 399680), (80, 354716), (142, 199840), (160, 177358), (284, 99920), (320, 88679), (355, 79936), (568, 49960), (710, 39968), (1136, 24980), (1249, 22720), (1420, 19984), (2272, 12490), (2498, 11360), (2840, 9992), (4544, 6245), (4996, 5680)]