21420165

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109847}}^1$

素因数の和:109868

約数の個数: 16

約数和(自身を含む): 36908928

約数和(自身を除く): 15488763

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 109847, 329541, 549235, 1428011, 1647705, 4284033, 7140055, 21420165]

約数ペア:

[(1, 21420165), (3, 7140055), (5, 4284033), (13, 1647705), (15, 1428011), (39, 549235), (65, 329541), (195, 109847)]