21221825

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:377

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6276415

約数列:

[1, 5, 25, 31, 139, 155, 197, 695, 775, 985, 3475, 4309, 4925, 6107, 21545, 27383, 30535, 107725, 136915, 152675, 684575, 848873, 4244365, 21221825]

約数ペア:

[(1, 21221825), (5, 4244365), (25, 848873), (31, 684575), (139, 152675), (155, 136915), (197, 107725), (695, 30535), (775, 27383), (985, 21545), (3475, 6107), (4309, 4925)]