81894220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99871}}^1$

素因数の和:99921

約数の個数: 24

約数和(自身を含む): 176174208

約数和(自身を除く): 94279988

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99871, 199742, 399484, 499355, 998710, 1997420, 4094711, 8189422, 16378844, 20473555, 40947110, 81894220]

約数ペア:

[(1, 81894220), (2, 40947110), (4, 20473555), (5, 16378844), (10, 8189422), (20, 4094711), (41, 1997420), (82, 998710), (164, 499355), (205, 399484), (410, 199742), (820, 99871)]