21386885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{2179}}^1$

素因数の和:2348

約数の個数: 16

約数和(自身を含む): 27834240

約数和(自身を除く): 6447355

約数列:

[1, 5, 13, 65, 151, 755, 1963, 2179, 9815, 10895, 28327, 141635, 329029, 1645145, 4277377, 21386885]

約数ペア:

[(1, 21386885), (5, 4277377), (13, 1645145), (65, 329029), (151, 141635), (755, 28327), (1963, 10895), (2179, 9815)]