21378825

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7309}}^1$

素因数の和:7338

約数の個数: 36

約数和(自身を含む): 41243020

約数和(自身を除く): 19864195

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 7309, 21927, 36545, 65781, 95017, 109635, 182725, 285051, 328905, 475085, 548175, 855153, 1425255, 1644525, 2375425, 4275765, 7126275, 21378825]

約数ペア:

[(1, 21378825), (3, 7126275), (5, 4275765), (9, 2375425), (13, 1644525), (15, 1425255), (25, 855153), (39, 548175), (45, 475085), (65, 328905), (75, 285051), (117, 182725), (195, 109635), (225, 95017), (325, 65781), (585, 36545), (975, 21927), (2925, 7309)]