21455415

素因数分解:

$3^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1543}}^1$

素因数の和:1660

約数の個数: 32

約数和(自身を含む): 38538240

約数和(自身を除く): 17082825

約数列:

[1, 3, 5, 9, 15, 27, 45, 103, 135, 309, 515, 927, 1543, 1545, 2781, 4629, 4635, 7715, 13887, 13905, 23145, 41661, 69435, 158929, 208305, 476787, 794645, 1430361, 2383935, 4291083, 7151805, 21455415]

約数ペア:

[(1, 21455415), (3, 7151805), (5, 4291083), (9, 2383935), (15, 1430361), (27, 794645), (45, 476787), (103, 208305), (135, 158929), (309, 69435), (515, 41661), (927, 23145), (1543, 13905), (1545, 13887), (2781, 7715), (4629, 4635)]