210907775

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{49919}}^1$

素因数の和:49955

約数の個数: 18

約数和(自身を含む): 283196160

約数和(自身を除く): 72288385

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 49919, 249595, 648947, 1247975, 3244735, 8436311, 16223675, 42181555, 210907775]

約数ペア:

[(1, 210907775), (5, 42181555), (13, 16223675), (25, 8436311), (65, 3244735), (169, 1247975), (325, 648947), (845, 249595), (4225, 49919)]