211013505

素因数分解:

$3^4\times 5^1\times {\mathrm{521021}}^1$

素因数の和:521038

約数の個数: 20

約数和(自身を含む): 378261972

約数和(自身を除く): 167248467

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 521021, 1563063, 2605105, 4689189, 7815315, 14067567, 23445945, 42202701, 70337835, 211013505]

約数ペア:

[(1, 211013505), (3, 70337835), (5, 42202701), (9, 23445945), (15, 14067567), (27, 7815315), (45, 4689189), (81, 2605105), (135, 1563063), (405, 521021)]