81451640

素因数分解:

$2^3\times 5^1\times {\mathrm{1117}}^1\times {\mathrm{1823}}^1$

素因数の和:2951

約数の個数: 32

約数和(自身を含む): 183530880

約数和(自身を除く): 102079240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1117, 1823, 2234, 3646, 4468, 5585, 7292, 8936, 9115, 11170, 14584, 18230, 22340, 36460, 44680, 72920, 2036291, 4072582, 8145164, 10181455, 16290328, 20362910, 40725820, 81451640]

約数ペア:

[(1, 81451640), (2, 40725820), (4, 20362910), (5, 16290328), (8, 10181455), (10, 8145164), (20, 4072582), (40, 2036291), (1117, 72920), (1823, 44680), (2234, 36460), (3646, 22340), (4468, 18230), (5585, 14584), (7292, 11170), (8936, 9115)]