21585285

素因数分解:

$3^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:479

約数の個数: 40

約数和(自身を含む): 39029760

約数和(自身を除く): 17444475

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 223, 239, 405, 669, 717, 1115, 1195, 2007, 2151, 3345, 3585, 6021, 6453, 10035, 10755, 18063, 19359, 30105, 32265, 53297, 90315, 96795, 159891, 266485, 479673, 799455, 1439019, 2398365, 4317057, 7195095, 21585285]

約数ペア:

[(1, 21585285), (3, 7195095), (5, 4317057), (9, 2398365), (15, 1439019), (27, 799455), (45, 479673), (81, 266485), (135, 159891), (223, 96795), (239, 90315), (405, 53297), (669, 32265), (717, 30105), (1115, 19359), (1195, 18063), (2007, 10755), (2151, 10035), (3345, 6453), (3585, 6021)]