81476680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65707}}^1$

素因数の和:65749

約数の個数: 32

約数和(自身を含む): 189239040

約数和(自身を除く): 107762360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65707, 131414, 262828, 328535, 525656, 657070, 1314140, 2036917, 2628280, 4073834, 8147668, 10184585, 16295336, 20369170, 40738340, 81476680]

約数ペア:

[(1, 81476680), (2, 40738340), (4, 20369170), (5, 16295336), (8, 10184585), (10, 8147668), (20, 4073834), (31, 2628280), (40, 2036917), (62, 1314140), (124, 657070), (155, 525656), (248, 328535), (310, 262828), (620, 131414), (1240, 65707)]