21765915

素因数分解:

$3^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{241}}^1$

素因数の和:481

約数の個数: 40

約数和(自身を含む): 39355008

約数和(自身を除く): 17589093

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 223, 241, 405, 669, 723, 1115, 1205, 2007, 2169, 3345, 3615, 6021, 6507, 10035, 10845, 18063, 19521, 30105, 32535, 53743, 90315, 97605, 161229, 268715, 483687, 806145, 1451061, 2418435, 4353183, 7255305, 21765915]

約数ペア:

[(1, 21765915), (3, 7255305), (5, 4353183), (9, 2418435), (15, 1451061), (27, 806145), (45, 483687), (81, 268715), (135, 161229), (223, 97605), (241, 90315), (405, 53743), (669, 32535), (723, 30105), (1115, 19521), (1205, 18063), (2007, 10845), (2169, 10035), (3345, 6507), (3615, 6021)]