18256815

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 33770880

約数和(自身を除く): 15514065

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 131, 163, 171, 285, 393, 489, 655, 815, 855, 1179, 1467, 1965, 2445, 2489, 3097, 5895, 7335, 7467, 9291, 12445, 15485, 21353, 22401, 27873, 37335, 46455, 64059, 106765, 112005, 139365, 192177, 320295, 405707, 960885, 1217121, 2028535, 3651363, 6085605, 18256815]

約数ペア:

[(1, 18256815), (3, 6085605), (5, 3651363), (9, 2028535), (15, 1217121), (19, 960885), (45, 405707), (57, 320295), (95, 192177), (131, 139365), (163, 112005), (171, 106765), (285, 64059), (393, 46455), (489, 37335), (655, 27873), (815, 22401), (855, 21353), (1179, 15485), (1467, 12445), (1965, 9291), (2445, 7467), (2489, 7335), (3097, 5895)]