21000866840

素因数分解:

$2^3\times 5^1\times {\mathrm{1109}}^1\times {\mathrm{473419}}^1$

素因数の和:474539

約数の個数: 32

約数和(自身を含む): 47294658000

約数和(自身を除く): 26293791160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1109, 2218, 4436, 5545, 8872, 11090, 22180, 44360, 473419, 946838, 1893676, 2367095, 3787352, 4734190, 9468380, 18936760, 525021671, 1050043342, 2100086684, 2625108355, 4200173368, 5250216710, 10500433420, 21000866840]

約数ペア:

[(1, 21000866840), (2, 10500433420), (4, 5250216710), (5, 4200173368), (8, 2625108355), (10, 2100086684), (20, 1050043342), (40, 525021671), (1109, 18936760), (2218, 9468380), (4436, 4734190), (5545, 3787352), (8872, 2367095), (11090, 1893676), (22180, 946838), (44360, 473419)]