21315644505

素因数分解:

$3^4\times 5^1\times {\mathrm{52631221}}^1$

素因数の和:52631238

約数の個数: 20

約数和(自身を含む): 38210267172

約数和(自身を除く): 16894622667

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52631221, 157893663, 263156105, 473680989, 789468315, 1421042967, 2368404945, 4263128901, 7105214835, 21315644505]

約数ペア:

[(1, 21315644505), (3, 7105214835), (5, 4263128901), (9, 2368404945), (15, 1421042967), (27, 789468315), (45, 473680989), (81, 263156105), (135, 157893663), (405, 52631221)]