18661840

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{487}}^1$

素因数の和:979

約数の個数: 40

約数和(自身を含む): 43568640

約数和(自身を除く): 24906800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 487, 958, 974, 1916, 1948, 2395, 2435, 3832, 3896, 4790, 4870, 7664, 7792, 9580, 9740, 19160, 19480, 38320, 38960, 233273, 466546, 933092, 1166365, 1866184, 2332730, 3732368, 4665460, 9330920, 18661840]

約数ペア:

[(1, 18661840), (2, 9330920), (4, 4665460), (5, 3732368), (8, 2332730), (10, 1866184), (16, 1166365), (20, 933092), (40, 466546), (80, 233273), (479, 38960), (487, 38320), (958, 19480), (974, 19160), (1916, 9740), (1948, 9580), (2395, 7792), (2435, 7664), (3832, 4870), (3896, 4790)]