18661640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6571}}^1$

素因数の和:6653

約数の個数: 32

約数和(自身を含む): 42586560

約数和(自身を除く): 23924920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6571, 13142, 26284, 32855, 52568, 65710, 131420, 262840, 466541, 933082, 1866164, 2332705, 3732328, 4665410, 9330820, 18661640]

約数ペア:

[(1, 18661640), (2, 9330820), (4, 4665410), (5, 3732328), (8, 2332705), (10, 1866164), (20, 933082), (40, 466541), (71, 262840), (142, 131420), (284, 65710), (355, 52568), (568, 32855), (710, 26284), (1420, 13142), (2840, 6571)]