21896775

素因数分解:

$3^2\times 5^2\times {\mathrm{307}}^1\times {\mathrm{317}}^1$

素因数の和:640

約数の個数: 36

約数和(自身を含む): 39471432

約数和(自身を除く): 17574657

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 307, 317, 921, 951, 1535, 1585, 2763, 2853, 4605, 4755, 7675, 7925, 13815, 14265, 23025, 23775, 69075, 71325, 97319, 291957, 486595, 875871, 1459785, 2432975, 4379355, 7298925, 21896775]

約数ペア:

[(1, 21896775), (3, 7298925), (5, 4379355), (9, 2432975), (15, 1459785), (25, 875871), (45, 486595), (75, 291957), (225, 97319), (307, 71325), (317, 69075), (921, 23775), (951, 23025), (1535, 14265), (1585, 13815), (2763, 7925), (2853, 7675), (4605, 4755)]