17991640

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2017}}^1$

素因数の和:2251

約数の個数: 32

約数和(自身を含む): 40682880

約数和(自身を除く): 22691240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2017, 2230, 4034, 4460, 8068, 8920, 10085, 16136, 20170, 40340, 80680, 449791, 899582, 1799164, 2248955, 3598328, 4497910, 8995820, 17991640]

約数ペア:

[(1, 17991640), (2, 8995820), (4, 4497910), (5, 3598328), (8, 2248955), (10, 1799164), (20, 899582), (40, 449791), (223, 80680), (446, 40340), (892, 20170), (1115, 16136), (1784, 10085), (2017, 8920), (2230, 8068), (4034, 4460)]