28787840

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1451}}^1$

素因数の和:1501

約数の個数: 64

約数和(自身を含む): 71089920

約数和(自身を除く): 42302080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1451, 1984, 2480, 2902, 3968, 4960, 5804, 7255, 9920, 11608, 14510, 19840, 23216, 29020, 44981, 46432, 58040, 89962, 92864, 116080, 179924, 185728, 224905, 232160, 359848, 449810, 464320, 719696, 899620, 928640, 1439392, 1799240, 2878784, 3598480, 5757568, 7196960, 14393920, 28787840]

約数ペア:

[(1, 28787840), (2, 14393920), (4, 7196960), (5, 5757568), (8, 3598480), (10, 2878784), (16, 1799240), (20, 1439392), (31, 928640), (32, 899620), (40, 719696), (62, 464320), (64, 449810), (80, 359848), (124, 232160), (128, 224905), (155, 185728), (160, 179924), (248, 116080), (310, 92864), (320, 89962), (496, 58040), (620, 46432), (640, 44981), (992, 29020), (1240, 23216), (1451, 19840), (1984, 14510), (2480, 11608), (2902, 9920), (3968, 7255), (4960, 5804)]