21980387

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 27772416

約数和(自身を除く): 5792029

約数列:

[1, 11, 13, 23, 41, 143, 163, 253, 299, 451, 533, 943, 1793, 2119, 3289, 3749, 5863, 6683, 10373, 12259, 23309, 41239, 48737, 73513, 86879, 134849, 153709, 536107, 955669, 1690799, 1998217, 21980387]

約数ペア:

[(1, 21980387), (11, 1998217), (13, 1690799), (23, 955669), (41, 536107), (143, 153709), (163, 134849), (253, 86879), (299, 73513), (451, 48737), (533, 41239), (943, 23309), (1793, 12259), (2119, 10373), (3289, 6683), (3749, 5863)]