20969390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161303}}^1$

素因数の和:161323

約数の個数: 16

約数和(自身を含む): 40648608

約数和(自身を除く): 19679218

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161303, 322606, 806515, 1613030, 2096939, 4193878, 10484695, 20969390]

約数ペア:

[(1, 20969390), (2, 10484695), (5, 4193878), (10, 2096939), (13, 1613030), (26, 806515), (65, 322606), (130, 161303)]