20639312

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{229}}^1$

素因数の和:411

約数の個数: 40

約数和(自身を含む): 41411040

約数和(自身を除く): 20771728

約数列:

[1, 2, 4, 8, 16, 43, 86, 131, 172, 229, 262, 344, 458, 524, 688, 916, 1048, 1832, 2096, 3664, 5633, 9847, 11266, 19694, 22532, 29999, 39388, 45064, 59998, 78776, 90128, 119996, 157552, 239992, 479984, 1289957, 2579914, 5159828, 10319656, 20639312]

約数ペア:

[(1, 20639312), (2, 10319656), (4, 5159828), (8, 2579914), (16, 1289957), (43, 479984), (86, 239992), (131, 157552), (172, 119996), (229, 90128), (262, 78776), (344, 59998), (458, 45064), (524, 39388), (688, 29999), (916, 22532), (1048, 19694), (1832, 11266), (2096, 9847), (3664, 5633)]