20478897

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{977}}^1$

素因数の和:1137

約数の個数: 24

約数和(自身を含む): 31581576

約数和(自身を除く): 11102679

約数列:

[1, 3, 9, 17, 51, 137, 153, 411, 977, 1233, 2329, 2931, 6987, 8793, 16609, 20961, 49827, 133849, 149481, 401547, 1204641, 2275433, 6826299, 20478897]

約数ペア:

[(1, 20478897), (3, 6826299), (9, 2275433), (17, 1204641), (51, 401547), (137, 149481), (153, 133849), (411, 49827), (977, 20961), (1233, 16609), (2329, 8793), (2931, 6987)]