19655920

素因数分解:

$2^4\times 5^1\times {\mathrm{277}}^1\times {\mathrm{887}}^1$

素因数の和:1177

約数の個数: 40

約数和(自身を含む): 45916704

約数和(自身を除く): 26260784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 277, 554, 887, 1108, 1385, 1774, 2216, 2770, 3548, 4432, 4435, 5540, 7096, 8870, 11080, 14192, 17740, 22160, 35480, 70960, 245699, 491398, 982796, 1228495, 1965592, 2456990, 3931184, 4913980, 9827960, 19655920]

約数ペア:

[(1, 19655920), (2, 9827960), (4, 4913980), (5, 3931184), (8, 2456990), (10, 1965592), (16, 1228495), (20, 982796), (40, 491398), (80, 245699), (277, 70960), (554, 35480), (887, 22160), (1108, 17740), (1385, 14192), (1774, 11080), (2216, 8870), (2770, 7096), (3548, 5540), (4432, 4435)]