18540925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{641}}^1$

素因数の和:753

約数の個数: 24

約数和(自身を含む): 25076520

約数和(自身を除く): 6535595

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 641, 1157, 2225, 3205, 5785, 8333, 16025, 28925, 41665, 57049, 208325, 285245, 741637, 1426225, 3708185, 18540925]

約数ペア:

[(1, 18540925), (5, 3708185), (13, 1426225), (25, 741637), (65, 285245), (89, 208325), (325, 57049), (445, 41665), (641, 28925), (1157, 16025), (2225, 8333), (3205, 5785)]