21781216

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{40039}}^1$

素因数の和:40066

約数の個数: 24

約数和(自身を含む): 45405360

約数和(自身を除く): 23624144

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 272, 544, 40039, 80078, 160156, 320312, 640624, 680663, 1281248, 1361326, 2722652, 5445304, 10890608, 21781216]

約数ペア:

[(1, 21781216), (2, 10890608), (4, 5445304), (8, 2722652), (16, 1361326), (17, 1281248), (32, 680663), (34, 640624), (68, 320312), (136, 160156), (272, 80078), (544, 40039)]