20406725

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 26581632

約数和(自身を除く): 6174907

約数列:

[1, 5, 25, 41, 43, 205, 215, 463, 1025, 1075, 1763, 2315, 8815, 11575, 18983, 19909, 44075, 94915, 99545, 474575, 497725, 816269, 4081345, 20406725]

約数ペア:

[(1, 20406725), (5, 4081345), (25, 816269), (41, 497725), (43, 474575), (205, 99545), (215, 94915), (463, 44075), (1025, 19909), (1075, 18983), (1763, 11575), (2315, 8815)]