28743640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:460

約数の個数: 64

約数和(自身を含む): 68040000

約数和(自身を除く): 39296360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 284, 290, 349, 355, 568, 580, 698, 710, 1160, 1396, 1420, 1745, 2059, 2792, 2840, 3490, 4118, 6980, 8236, 10121, 10295, 13960, 16472, 20242, 20590, 24779, 40484, 41180, 49558, 50605, 80968, 82360, 99116, 101210, 123895, 198232, 202420, 247790, 404840, 495580, 718591, 991160, 1437182, 2874364, 3592955, 5748728, 7185910, 14371820, 28743640]

約数ペア:

[(1, 28743640), (2, 14371820), (4, 7185910), (5, 5748728), (8, 3592955), (10, 2874364), (20, 1437182), (29, 991160), (40, 718591), (58, 495580), (71, 404840), (116, 247790), (142, 202420), (145, 198232), (232, 123895), (284, 101210), (290, 99116), (349, 82360), (355, 80968), (568, 50605), (580, 49558), (698, 41180), (710, 40484), (1160, 24779), (1396, 20590), (1420, 20242), (1745, 16472), (2059, 13960), (2792, 10295), (2840, 10121), (3490, 8236), (4118, 6980)]