20581665

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{353}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 37314432

約数和(自身を除く): 16732767

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 169, 195, 299, 345, 353, 507, 845, 897, 1059, 1495, 1765, 2535, 3887, 4485, 4589, 5295, 8119, 11661, 13767, 19435, 22945, 24357, 40595, 58305, 59657, 68835, 105547, 121785, 178971, 298285, 316641, 527735, 894855, 1372111, 1583205, 4116333, 6860555, 20581665]

約数ペア:

[(1, 20581665), (3, 6860555), (5, 4116333), (13, 1583205), (15, 1372111), (23, 894855), (39, 527735), (65, 316641), (69, 298285), (115, 178971), (169, 121785), (195, 105547), (299, 68835), (345, 59657), (353, 58305), (507, 40595), (845, 24357), (897, 22945), (1059, 19435), (1495, 13767), (1765, 11661), (2535, 8119), (3887, 5295), (4485, 4589)]