18987760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21577}}^1$

素因数の和:21601

約数の個数: 40

約数和(自身を含む): 48162096

約数和(自身を除く): 29174336

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21577, 43154, 86308, 107885, 172616, 215770, 237347, 345232, 431540, 474694, 863080, 949388, 1186735, 1726160, 1898776, 2373470, 3797552, 4746940, 9493880, 18987760]

約数ペア:

[(1, 18987760), (2, 9493880), (4, 4746940), (5, 3797552), (8, 2373470), (10, 1898776), (11, 1726160), (16, 1186735), (20, 949388), (22, 863080), (40, 474694), (44, 431540), (55, 345232), (80, 237347), (88, 215770), (110, 172616), (176, 107885), (220, 86308), (440, 43154), (880, 21577)]