20627555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 28546560

約数和(自身を除く): 7919005

約数列:

[1, 5, 13, 29, 31, 65, 145, 155, 353, 377, 403, 899, 1765, 1885, 2015, 4495, 4589, 10237, 10943, 11687, 22945, 51185, 54715, 58435, 133081, 142259, 317347, 665405, 711295, 1586735, 4125511, 20627555]

約数ペア:

[(1, 20627555), (5, 4125511), (13, 1586735), (29, 711295), (31, 665405), (65, 317347), (145, 142259), (155, 133081), (353, 58435), (377, 54715), (403, 51185), (899, 22945), (1765, 11687), (1885, 10943), (2015, 10237), (4495, 4589)]