20216665

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:182

約数の個数: 48

約数和(自身を含む): 30697920

約数和(自身を除く): 10481255

約数列:

[1, 5, 7, 19, 35, 43, 49, 95, 101, 133, 215, 245, 301, 505, 665, 707, 817, 931, 1505, 1919, 2107, 3535, 4085, 4343, 4655, 4949, 5719, 9595, 10535, 13433, 21715, 24745, 28595, 30401, 40033, 67165, 82517, 94031, 152005, 200165, 212807, 412585, 470155, 577619, 1064035, 2888095, 4043333, 20216665]

約数ペア:

[(1, 20216665), (5, 4043333), (7, 2888095), (19, 1064035), (35, 577619), (43, 470155), (49, 412585), (95, 212807), (101, 200165), (133, 152005), (215, 94031), (245, 82517), (301, 67165), (505, 40033), (665, 30401), (707, 28595), (817, 24745), (931, 21715), (1505, 13433), (1919, 10535), (2107, 9595), (3535, 5719), (4085, 4949), (4343, 4655)]