81108640

素因数分解:

$2^5\times 5^1\times {\mathrm{506929}}^1$

素因数の和:506944

約数の個数: 24

約数和(自身を含む): 191619540

約数和(自身を除く): 110510900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 506929, 1013858, 2027716, 2534645, 4055432, 5069290, 8110864, 10138580, 16221728, 20277160, 40554320, 81108640]

約数ペア:

[(1, 81108640), (2, 40554320), (4, 20277160), (5, 16221728), (8, 10138580), (10, 8110864), (16, 5069290), (20, 4055432), (32, 2534645), (40, 2027716), (80, 1013858), (160, 506929)]