81242960

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{9491}}^1$

素因数の和:9611

約数の個数: 40

約数和(自身を含む): 190675296

約数和(自身を除く): 109432336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 4280, 8560, 9491, 18982, 37964, 47455, 75928, 94910, 151856, 189820, 379640, 759280, 1015537, 2031074, 4062148, 5077685, 8124296, 10155370, 16248592, 20310740, 40621480, 81242960]

約数ペア:

[(1, 81242960), (2, 40621480), (4, 20310740), (5, 16248592), (8, 10155370), (10, 8124296), (16, 5077685), (20, 4062148), (40, 2031074), (80, 1015537), (107, 759280), (214, 379640), (428, 189820), (535, 151856), (856, 94910), (1070, 75928), (1712, 47455), (2140, 37964), (4280, 18982), (8560, 9491)]