21509415

素因数分解:

$3^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{563}}^1$

素因数の和:860

約数の個数: 32

約数和(自身を含む): 38442240

約数和(自身を除く): 16932825

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 283, 563, 849, 1415, 1689, 2547, 2815, 4245, 5067, 7641, 8445, 12735, 15201, 25335, 38205, 76005, 159329, 477987, 796645, 1433961, 2389935, 4301883, 7169805, 21509415]

約数ペア:

[(1, 21509415), (3, 7169805), (5, 4301883), (9, 2389935), (15, 1433961), (27, 796645), (45, 477987), (135, 159329), (283, 76005), (563, 38205), (849, 25335), (1415, 15201), (1689, 12735), (2547, 8445), (2815, 7641), (4245, 5067)]