20408415

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{491}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 34857216

約数和(自身を除く): 14448801

約数列:

[1, 3, 5, 15, 17, 51, 85, 163, 255, 489, 491, 815, 1473, 2445, 2455, 2771, 7365, 8313, 8347, 13855, 25041, 41565, 41735, 80033, 125205, 240099, 400165, 1200495, 1360561, 4081683, 6802805, 20408415]

約数ペア:

[(1, 20408415), (3, 6802805), (5, 4081683), (15, 1360561), (17, 1200495), (51, 400165), (85, 240099), (163, 125205), (255, 80033), (489, 41735), (491, 41565), (815, 25041), (1473, 13855), (2445, 8347), (2455, 8313), (2771, 7365)]