21493745

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{487}}^1$

素因数の和:609

約数の個数: 32

約数和(自身を含む): 32137728

約数和(自身を除く): 10643983

約数列:

[1, 5, 7, 13, 35, 65, 91, 97, 455, 485, 487, 679, 1261, 2435, 3395, 3409, 6305, 6331, 8827, 17045, 31655, 44135, 44317, 47239, 221585, 236195, 330673, 614107, 1653365, 3070535, 4298749, 21493745]

約数ペア:

[(1, 21493745), (5, 4298749), (7, 3070535), (13, 1653365), (35, 614107), (65, 330673), (91, 236195), (97, 221585), (455, 47239), (485, 44317), (487, 44135), (679, 31655), (1261, 17045), (2435, 8827), (3395, 6331), (3409, 6305)]