21508285

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 29001600

約数和(自身を除く): 7493315

約数列:

[1, 5, 19, 29, 37, 95, 145, 185, 211, 551, 703, 1055, 1073, 2755, 3515, 4009, 5365, 6119, 7807, 20045, 20387, 30595, 39035, 101935, 116261, 148333, 226403, 581305, 741665, 1132015, 4301657, 21508285]

約数ペア:

[(1, 21508285), (5, 4301657), (19, 1132015), (29, 741665), (37, 581305), (95, 226403), (145, 148333), (185, 116261), (211, 101935), (551, 39035), (703, 30595), (1055, 20387), (1073, 20045), (2755, 7807), (3515, 6119), (4009, 5365)]