20819981

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2099}}^1$

素因数の和:2228

約数の個数: 16

約数和(自身を含む): 25872000

約数和(自身を除く): 5052019

約数列:

[1, 7, 13, 91, 109, 763, 1417, 2099, 9919, 14693, 27287, 191009, 228791, 1601537, 2974283, 20819981]

約数ペア:

[(1, 20819981), (7, 2974283), (13, 1601537), (91, 228791), (109, 191009), (763, 27287), (1417, 14693), (2099, 9919)]