21517047

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 31868928

約数和(自身を除く): 10351881

約数列:

[1, 3, 9, 71, 151, 213, 223, 453, 639, 669, 1359, 2007, 10721, 15833, 32163, 33673, 47499, 96489, 101019, 142497, 303057, 2390783, 7172349, 21517047]

約数ペア:

[(1, 21517047), (3, 7172349), (9, 2390783), (71, 303057), (151, 142497), (213, 101019), (223, 96489), (453, 47499), (639, 33673), (669, 32163), (1359, 15833), (2007, 10721)]