21285615

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6421}}^1$

素因数の和:6459

約数の個数: 32

約数和(自身を含む): 38840256

約数和(自身を除く): 17554641

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6421, 19263, 32105, 83473, 96315, 109157, 250419, 327471, 417365, 545785, 1252095, 1419041, 1637355, 4257123, 7095205, 21285615]

約数ペア:

[(1, 21285615), (3, 7095205), (5, 4257123), (13, 1637355), (15, 1419041), (17, 1252095), (39, 545785), (51, 417365), (65, 327471), (85, 250419), (195, 109157), (221, 96315), (255, 83473), (663, 32105), (1105, 19263), (3315, 6421)]