21052015

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{3001}}^1$

素因数の和:3090

約数の個数: 16

約数和(自身を含む): 26801856

約数和(自身を除く): 5749841

約数列:

[1, 5, 23, 61, 115, 305, 1403, 3001, 7015, 15005, 69023, 183061, 345115, 915305, 4210403, 21052015]

約数ペア:

[(1, 21052015), (5, 4210403), (23, 915305), (61, 345115), (115, 183061), (305, 69023), (1403, 15005), (3001, 7015)]