21490430

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{165311}}^1$

素因数の和:165331

約数の個数: 16

約数和(自身を含む): 41658624

約数和(自身を除く): 20168194

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 165311, 330622, 826555, 1653110, 2149043, 4298086, 10745215, 21490430]

約数ペア:

[(1, 21490430), (2, 10745215), (5, 4298086), (10, 2149043), (13, 1653110), (26, 826555), (65, 330622), (130, 165311)]