21985340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84559}}^1$

素因数の和:84581

約数の個数: 24

約数和(自身を含む): 49721280

約数和(自身を除く): 27735940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84559, 169118, 338236, 422795, 845590, 1099267, 1691180, 2198534, 4397068, 5496335, 10992670, 21985340]

約数ペア:

[(1, 21985340), (2, 10992670), (4, 5496335), (5, 4397068), (10, 2198534), (13, 1691180), (20, 1099267), (26, 845590), (52, 422795), (65, 338236), (130, 169118), (260, 84559)]