20814795

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 38218752

約数和(自身を除く): 17403957

約数列:

[1, 3, 5, 9, 15, 31, 43, 45, 93, 129, 155, 215, 279, 347, 387, 465, 645, 1041, 1333, 1395, 1735, 1935, 3123, 3999, 5205, 6665, 10757, 11997, 14921, 15615, 19995, 32271, 44763, 53785, 59985, 74605, 96813, 134289, 161355, 223815, 462551, 484065, 671445, 1387653, 2312755, 4162959, 6938265, 20814795]

約数ペア:

[(1, 20814795), (3, 6938265), (5, 4162959), (9, 2312755), (15, 1387653), (31, 671445), (43, 484065), (45, 462551), (93, 223815), (129, 161355), (155, 134289), (215, 96813), (279, 74605), (347, 59985), (387, 53785), (465, 44763), (645, 32271), (1041, 19995), (1333, 15615), (1395, 14921), (1735, 11997), (1935, 10757), (3123, 6665), (3999, 5205)]