20157865

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6329}}^1$

素因数の和:6361

約数の個数: 24

約数和(自身を含む): 30308040

約数和(自身を除く): 10150175

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6329, 31645, 44303, 82277, 221515, 310121, 411385, 575939, 1550605, 2879695, 4031573, 20157865]

約数ペア:

[(1, 20157865), (5, 4031573), (7, 2879695), (13, 1550605), (35, 575939), (49, 411385), (65, 310121), (91, 221515), (245, 82277), (455, 44303), (637, 31645), (3185, 6329)]