21385390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{164503}}^1$

素因数の和:164523

約数の個数: 16

約数和(自身を含む): 41455008

約数和(自身を除く): 20069618

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 164503, 329006, 822515, 1645030, 2138539, 4277078, 10692695, 21385390]

約数ペア:

[(1, 21385390), (2, 10692695), (5, 4277078), (10, 2138539), (13, 1645030), (26, 822515), (65, 329006), (130, 164503)]