21318310

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163987}}^1$

素因数の和:164007

約数の個数: 16

約数和(自身を含む): 41324976

約数和(自身を除く): 20006666

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163987, 327974, 819935, 1639870, 2131831, 4263662, 10659155, 21318310]

約数ペア:

[(1, 21318310), (2, 10659155), (5, 4263662), (10, 2131831), (13, 1639870), (26, 819935), (65, 327974), (130, 163987)]