18478971

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2141}}^1$

素因数の和:2291

約数の個数: 24

約数和(自身を含む): 30741984

約数和(自身を除く): 12263013

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2141, 2877, 6423, 8631, 14987, 19269, 44961, 134883, 293317, 879951, 2053219, 2639853, 6159657, 18478971]

約数ペア:

[(1, 18478971), (3, 6159657), (7, 2639853), (9, 2053219), (21, 879951), (63, 293317), (137, 134883), (411, 44961), (959, 19269), (1233, 14987), (2141, 8631), (2877, 6423)]