21291645

素因数分解:

$3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{13781}}^1$

素因数の和:13892

約数の個数: 16

約数和(自身を含む): 34399872

約数和(自身を除く): 13108227

約数列:

[1, 3, 5, 15, 103, 309, 515, 1545, 13781, 41343, 68905, 206715, 1419443, 4258329, 7097215, 21291645]

約数ペア:

[(1, 21291645), (3, 7097215), (5, 4258329), (15, 1419443), (103, 206715), (309, 68905), (515, 41343), (1545, 13781)]