18945520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21529}}^1$

素因数の和:21553

約数の個数: 40

約数和(自身を含む): 48054960

約数和(自身を除く): 29109440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21529, 43058, 86116, 107645, 172232, 215290, 236819, 344464, 430580, 473638, 861160, 947276, 1184095, 1722320, 1894552, 2368190, 3789104, 4736380, 9472760, 18945520]

約数ペア:

[(1, 18945520), (2, 9472760), (4, 4736380), (5, 3789104), (8, 2368190), (10, 1894552), (11, 1722320), (16, 1184095), (20, 947276), (22, 861160), (40, 473638), (44, 430580), (55, 344464), (80, 236819), (88, 215290), (110, 172232), (176, 107645), (220, 86116), (440, 43058), (880, 21529)]