81402745

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 107458560

約数和(自身を除く): 26055815

約数列:

[1, 5, 19, 31, 95, 131, 155, 211, 589, 655, 1055, 2489, 2945, 4009, 4061, 6541, 12445, 20045, 20305, 27641, 32705, 77159, 124279, 138205, 385795, 525179, 621395, 856871, 2625895, 4284355, 16280549, 81402745]

約数ペア:

[(1, 81402745), (5, 16280549), (19, 4284355), (31, 2625895), (95, 856871), (131, 621395), (155, 525179), (211, 385795), (589, 138205), (655, 124279), (1055, 77159), (2489, 32705), (2945, 27641), (4009, 20305), (4061, 20045), (6541, 12445)]