21784194440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7670491}}^1$

素因数の和:7670573

約数の個数: 32

約数和(自身を含む): 49704788160

約数和(自身を除く): 27920593720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7670491, 15340982, 30681964, 38352455, 61363928, 76704910, 153409820, 306819640, 544604861, 1089209722, 2178419444, 2723024305, 4356838888, 5446048610, 10892097220, 21784194440]

約数ペア:

[(1, 21784194440), (2, 10892097220), (4, 5446048610), (5, 4356838888), (8, 2723024305), (10, 2178419444), (20, 1089209722), (40, 544604861), (71, 306819640), (142, 153409820), (284, 76704910), (355, 61363928), (568, 38352455), (710, 30681964), (1420, 15340982), (2840, 7670491)]