20387725

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{461}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 26638920

約数和(自身を除く): 6251195

約数列:

[1, 5, 25, 29, 61, 145, 305, 461, 725, 1525, 1769, 2305, 8845, 11525, 13369, 28121, 44225, 66845, 140605, 334225, 703025, 815509, 4077545, 20387725]

約数ペア:

[(1, 20387725), (5, 4077545), (25, 815509), (29, 703025), (61, 334225), (145, 140605), (305, 66845), (461, 44225), (725, 28121), (1525, 13369), (1769, 11525), (2305, 8845)]