21053615

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20147}}^1$

素因数の和:20182

約数の個数: 16

約数和(自身を含む): 29013120

約数和(自身を除く): 7959505

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20147, 100735, 221617, 382793, 1108085, 1913965, 4210723, 21053615]

約数ペア:

[(1, 21053615), (5, 4210723), (11, 1913965), (19, 1108085), (55, 382793), (95, 221617), (209, 100735), (1045, 20147)]