20320525

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:513

約数の個数: 24

約数和(自身を含む): 26951400

約数和(自身を除く): 6630875

約数列:

[1, 5, 17, 25, 85, 137, 349, 425, 685, 1745, 2329, 3425, 5933, 8725, 11645, 29665, 47813, 58225, 148325, 239065, 812821, 1195325, 4064105, 20320525]

約数ペア:

[(1, 20320525), (5, 4064105), (17, 1195325), (25, 812821), (85, 239065), (137, 148325), (349, 58225), (425, 47813), (685, 29665), (1745, 11645), (2329, 8725), (3425, 5933)]