81420160

素因数分解:

$2^7\times 5^1\times {\mathrm{127219}}^1$

素因数の和:127238

約数の個数: 32

約数和(自身を含む): 194646600

約数和(自身を除く): 113226440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127219, 254438, 508876, 636095, 1017752, 1272190, 2035504, 2544380, 4071008, 5088760, 8142016, 10177520, 16284032, 20355040, 40710080, 81420160]

約数ペア:

[(1, 81420160), (2, 40710080), (4, 20355040), (5, 16284032), (8, 10177520), (10, 8142016), (16, 5088760), (20, 4071008), (32, 2544380), (40, 2035504), (64, 1272190), (80, 1017752), (128, 636095), (160, 508876), (320, 254438), (640, 127219)]