64654220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{104281}}^1$

素因数の和:104321

約数の個数: 24

約数和(自身を含む): 140155008

約数和(自身を除く): 75500788

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 104281, 208562, 417124, 521405, 1042810, 2085620, 3232711, 6465422, 12930844, 16163555, 32327110, 64654220]

約数ペア:

[(1, 64654220), (2, 32327110), (4, 16163555), (5, 12930844), (10, 6465422), (20, 3232711), (31, 2085620), (62, 1042810), (124, 521405), (155, 417124), (310, 208562), (620, 104281)]