20780965

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:469

約数の個数: 24

約数和(自身を含む): 27294840

約数和(自身を除く): 6513875

約数列:

[1, 5, 19, 29, 95, 145, 361, 397, 551, 1805, 1985, 2755, 7543, 10469, 11513, 37715, 52345, 57565, 143317, 218747, 716585, 1093735, 4156193, 20780965]

約数ペア:

[(1, 20780965), (5, 4156193), (19, 1093735), (29, 716585), (95, 218747), (145, 143317), (361, 57565), (397, 52345), (551, 37715), (1805, 11513), (1985, 10469), (2755, 7543)]