21031775

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{463}}^1$

素因数の和:575

約数の個数: 24

約数和(自身を含む): 27617280

約数和(自身を除く): 6585505

約数列:

[1, 5, 23, 25, 79, 115, 395, 463, 575, 1817, 1975, 2315, 9085, 10649, 11575, 36577, 45425, 53245, 182885, 266225, 841271, 914425, 4206355, 21031775]

約数ペア:

[(1, 21031775), (5, 4206355), (23, 914425), (25, 841271), (79, 266225), (115, 182885), (395, 53245), (463, 45425), (575, 36577), (1817, 11575), (1975, 10649), (2315, 9085)]