20474725

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{911}}^1$

素因数の和:981

約数の個数: 24

約数和(自身を含む): 27141120

約数和(自身を除く): 6666395

約数列:

[1, 5, 25, 29, 31, 145, 155, 725, 775, 899, 911, 4495, 4555, 22475, 22775, 26419, 28241, 132095, 141205, 660475, 706025, 818989, 4094945, 20474725]

約数ペア:

[(1, 20474725), (5, 4094945), (25, 818989), (29, 706025), (31, 660475), (145, 141205), (155, 132095), (725, 28241), (775, 26419), (899, 22775), (911, 22475), (4495, 4555)]