21720188

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{1163}}^1$

素因数の和:1226

約数の個数: 48

約数和(自身を含む): 46932480

約数和(自身を除く): 25212292

約数列:

[1, 2, 4, 7, 14, 23, 28, 29, 46, 58, 92, 116, 161, 203, 322, 406, 644, 667, 812, 1163, 1334, 2326, 2668, 4652, 4669, 8141, 9338, 16282, 18676, 26749, 32564, 33727, 53498, 67454, 106996, 134908, 187243, 236089, 374486, 472178, 748972, 775721, 944356, 1551442, 3102884, 5430047, 10860094, 21720188]

約数ペア:

[(1, 21720188), (2, 10860094), (4, 5430047), (7, 3102884), (14, 1551442), (23, 944356), (28, 775721), (29, 748972), (46, 472178), (58, 374486), (92, 236089), (116, 187243), (161, 134908), (203, 106996), (322, 67454), (406, 53498), (644, 33727), (667, 32564), (812, 26749), (1163, 18676), (1334, 16282), (2326, 9338), (2668, 8141), (4652, 4669)]