21245990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{111821}}^1$

素因数の和:111847

約数の個数: 16

約数和(自身を含む): 40255920

約数和(自身を除く): 19009930

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 111821, 223642, 559105, 1118210, 2124599, 4249198, 10622995, 21245990]

約数ペア:

[(1, 21245990), (2, 10622995), (5, 4249198), (10, 2124599), (19, 1118210), (38, 559105), (95, 223642), (190, 111821)]