21241715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20327}}^1$

素因数の和:20362

約数の個数: 16

約数和(自身を含む): 29272320

約数和(自身を除く): 8030605

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20327, 101635, 223597, 386213, 1117985, 1931065, 4248343, 21241715]

約数ペア:

[(1, 21241715), (5, 4248343), (11, 1931065), (19, 1117985), (55, 386213), (95, 223597), (209, 101635), (1045, 20327)]