21455847

素因数分解:

$3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{479}}^1$

素因数の和:577

約数の個数: 40

約数和(自身を含む): 37171200

約数和(自身を除く): 15715353

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 189, 237, 479, 553, 567, 711, 1437, 1659, 2133, 3353, 4311, 4977, 6399, 10059, 12933, 14931, 30177, 37841, 38799, 44793, 90531, 113523, 264887, 271593, 340569, 794661, 1021707, 2383983, 3065121, 7151949, 21455847]

約数ペア:

[(1, 21455847), (3, 7151949), (7, 3065121), (9, 2383983), (21, 1021707), (27, 794661), (63, 340569), (79, 271593), (81, 264887), (189, 113523), (237, 90531), (479, 44793), (553, 38799), (567, 37841), (711, 30177), (1437, 14931), (1659, 12933), (2133, 10059), (3353, 6399), (4311, 4977)]