21065891

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4637}}^1$

素因数の和:4714

約数の個数: 16

約数和(自身を含む): 26714880

約数和(自身を除く): 5648989

約数列:

[1, 7, 11, 59, 77, 413, 649, 4543, 4637, 32459, 51007, 273583, 357049, 1915081, 3009413, 21065891]

約数ペア:

[(1, 21065891), (7, 3009413), (11, 1915081), (59, 357049), (77, 273583), (413, 51007), (649, 32459), (4543, 4637)]