20565680

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11177}}^1$

素因数の和:11213

約数の個数: 40

約数和(自身を含む): 49898592

約数和(自身を除く): 29332912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11177, 22354, 44708, 55885, 89416, 111770, 178832, 223540, 257071, 447080, 514142, 894160, 1028284, 1285355, 2056568, 2570710, 4113136, 5141420, 10282840, 20565680]

約数ペア:

[(1, 20565680), (2, 10282840), (4, 5141420), (5, 4113136), (8, 2570710), (10, 2056568), (16, 1285355), (20, 1028284), (23, 894160), (40, 514142), (46, 447080), (80, 257071), (92, 223540), (115, 178832), (184, 111770), (230, 89416), (368, 55885), (460, 44708), (920, 22354), (1840, 11177)]