21528885

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1723}}^1$

素因数の和:1762

約数の個数: 48

約数和(自身を含む): 42451776

約数和(自身を除く): 20922891

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1723, 1785, 2499, 4165, 5169, 8615, 12061, 12495, 25845, 29291, 36183, 60305, 84427, 87873, 146455, 180915, 205037, 253281, 422135, 439365, 615111, 1025185, 1266405, 1435259, 3075555, 4305777, 7176295, 21528885]

約数ペア:

[(1, 21528885), (3, 7176295), (5, 4305777), (7, 3075555), (15, 1435259), (17, 1266405), (21, 1025185), (35, 615111), (49, 439365), (51, 422135), (85, 253281), (105, 205037), (119, 180915), (147, 146455), (245, 87873), (255, 84427), (357, 60305), (595, 36183), (735, 29291), (833, 25845), (1723, 12495), (1785, 12061), (2499, 8615), (4165, 5169)]