21272447

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{3571}}^1$

素因数の和:3638

約数の個数: 16

約数和(自身を含む): 26061312

約数和(自身を除く): 4788865

約数列:

[1, 7, 23, 37, 161, 259, 851, 3571, 5957, 24997, 82133, 132127, 574931, 924889, 3038921, 21272447]

約数ペア:

[(1, 21272447), (7, 3038921), (23, 924889), (37, 574931), (161, 132127), (259, 82133), (851, 24997), (3571, 5957)]