408020540

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{65179}}^1$

素因数の和:65501

約数の個数: 24

約数和(自身を含む): 859593840

約数和(自身を除く): 451573300

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 6260, 65179, 130358, 260716, 325895, 651790, 1303580, 20401027, 40802054, 81604108, 102005135, 204010270, 408020540]

約数ペア:

[(1, 408020540), (2, 204010270), (4, 102005135), (5, 81604108), (10, 40802054), (20, 20401027), (313, 1303580), (626, 651790), (1252, 325895), (1565, 260716), (3130, 130358), (6260, 65179)]