345220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:471

約数の個数: 24

約数和(自身を含む): 744408

約数和(自身を除く): 399188

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 421, 820, 842, 1684, 2105, 4210, 8420, 17261, 34522, 69044, 86305, 172610, 345220]

約数ペア:

[(1, 345220), (2, 172610), (4, 86305), (5, 69044), (10, 34522), (20, 17261), (41, 8420), (82, 4210), (164, 2105), (205, 1684), (410, 842), (421, 820)]