18806641

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 23491296

約数和(自身を除く): 4684655

約数列:

[1, 7, 17, 49, 107, 119, 211, 749, 833, 1477, 1819, 3587, 5243, 10339, 12733, 22577, 25109, 89131, 158039, 175763, 383809, 1106273, 2686663, 18806641]

約数ペア:

[(1, 18806641), (7, 2686663), (17, 1106273), (49, 383809), (107, 175763), (119, 158039), (211, 89131), (749, 25109), (833, 22577), (1477, 12733), (1819, 10339), (3587, 5243)]