18640940

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{9049}}^1$

素因数の和:9161

約数の個数: 24

約数和(自身を含む): 39530400

約数和(自身を除く): 20889460

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 9049, 18098, 36196, 45245, 90490, 180980, 932047, 1864094, 3728188, 4660235, 9320470, 18640940]

約数ペア:

[(1, 18640940), (2, 9320470), (4, 4660235), (5, 3728188), (10, 1864094), (20, 932047), (103, 180980), (206, 90490), (412, 45245), (515, 36196), (1030, 18098), (2060, 9049)]