21820955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{863}}^1$

素因数の和:1270

約数の個数: 16

約数和(自身を含む): 28304640

約数和(自身を除く): 6483685

約数列:

[1, 5, 13, 65, 389, 863, 1945, 4315, 5057, 11219, 25285, 56095, 335707, 1678535, 4364191, 21820955]

約数ペア:

[(1, 21820955), (5, 4364191), (13, 1678535), (65, 335707), (389, 56095), (863, 25285), (1945, 11219), (4315, 5057)]