21497931

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{26249}}^1$

素因数の和:26275

約数の個数: 24

約数和(自身を含む): 38220000

約数和(自身を除く): 16722069

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 26249, 78747, 183743, 236241, 341237, 551229, 1023711, 1653687, 2388659, 3071133, 7165977, 21497931]

約数ペア:

[(1, 21497931), (3, 7165977), (7, 3071133), (9, 2388659), (13, 1653687), (21, 1023711), (39, 551229), (63, 341237), (91, 236241), (117, 183743), (273, 78747), (819, 26249)]