21316955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20399}}^1$

素因数の和:20434

約数の個数: 16

約数和(自身を含む): 29376000

約数和(自身を除く): 8059045

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20399, 101995, 224389, 387581, 1121945, 1937905, 4263391, 21316955]

約数ペア:

[(1, 21316955), (5, 4263391), (11, 1937905), (19, 1121945), (55, 387581), (95, 224389), (209, 101995), (1045, 20399)]