21815845

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{11159}}^1$

素因数の和:11204

約数の個数: 16

約数和(自身を含む): 28926720

約数和(自身を除く): 7110875

約数列:

[1, 5, 17, 23, 85, 115, 391, 1955, 11159, 55795, 189703, 256657, 948515, 1283285, 4363169, 21815845]

約数ペア:

[(1, 21815845), (5, 4363169), (17, 1283285), (23, 948515), (85, 256657), (115, 189703), (391, 55795), (1955, 11159)]