31231640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{70981}}^1$

素因数の和:71003

約数の個数: 32

約数和(自身を含む): 76660560

約数和(自身を除く): 45428920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 70981, 141962, 283924, 354905, 567848, 709810, 780791, 1419620, 1561582, 2839240, 3123164, 3903955, 6246328, 7807910, 15615820, 31231640]

約数ペア:

[(1, 31231640), (2, 15615820), (4, 7807910), (5, 6246328), (8, 3903955), (10, 3123164), (11, 2839240), (20, 1561582), (22, 1419620), (40, 780791), (44, 709810), (55, 567848), (88, 354905), (110, 283924), (220, 141962), (440, 70981)]