20485240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12491}}^1$

素因数の和:12543

約数の個数: 32

約数和(自身を含む): 47219760

約数和(自身を除く): 26734520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12491, 24982, 49964, 62455, 99928, 124910, 249820, 499640, 512131, 1024262, 2048524, 2560655, 4097048, 5121310, 10242620, 20485240]

約数ペア:

[(1, 20485240), (2, 10242620), (4, 5121310), (5, 4097048), (8, 2560655), (10, 2048524), (20, 1024262), (40, 512131), (41, 499640), (82, 249820), (164, 124910), (205, 99928), (328, 62455), (410, 49964), (820, 24982), (1640, 12491)]