80909980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{1429}}^1$

素因数の和:1606

約数の個数: 48

約数和(自身を含む): 180180000

約数和(自身を除く): 99270020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 149, 190, 298, 380, 596, 745, 1429, 1490, 2831, 2858, 2980, 5662, 5716, 7145, 11324, 14155, 14290, 27151, 28310, 28580, 54302, 56620, 108604, 135755, 212921, 271510, 425842, 543020, 851684, 1064605, 2129210, 4045499, 4258420, 8090998, 16181996, 20227495, 40454990, 80909980]

約数ペア:

[(1, 80909980), (2, 40454990), (4, 20227495), (5, 16181996), (10, 8090998), (19, 4258420), (20, 4045499), (38, 2129210), (76, 1064605), (95, 851684), (149, 543020), (190, 425842), (298, 271510), (380, 212921), (596, 135755), (745, 108604), (1429, 56620), (1490, 54302), (2831, 28580), (2858, 28310), (2980, 27151), (5662, 14290), (5716, 14155), (7145, 11324)]