21891825

素因数分解:

$3^2\times 5^2\times {\mathrm{149}}^1\times {\mathrm{653}}^1$

素因数の和:818

約数の個数: 36

約数和(自身を含む): 39534300

約数和(自身を除く): 17642475

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 149, 225, 447, 653, 745, 1341, 1959, 2235, 3265, 3725, 5877, 6705, 9795, 11175, 16325, 29385, 33525, 48975, 97297, 146925, 291891, 486485, 875673, 1459455, 2432425, 4378365, 7297275, 21891825]

約数ペア:

[(1, 21891825), (3, 7297275), (5, 4378365), (9, 2432425), (15, 1459455), (25, 875673), (45, 486485), (75, 291891), (149, 146925), (225, 97297), (447, 48975), (653, 33525), (745, 29385), (1341, 16325), (1959, 11175), (2235, 9795), (3265, 6705), (3725, 5877)]