21999718

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:328

約数の個数: 32

約数和(自身を含む): 36773856

約数和(自身を除く): 14774138

約数列:

[1, 2, 13, 26, 67, 73, 134, 146, 173, 346, 871, 949, 1742, 1898, 2249, 4498, 4891, 9782, 11591, 12629, 23182, 25258, 63583, 127166, 150683, 164177, 301366, 328354, 846143, 1692286, 10999859, 21999718]

約数ペア:

[(1, 21999718), (2, 10999859), (13, 1692286), (26, 846143), (67, 328354), (73, 301366), (134, 164177), (146, 150683), (173, 127166), (346, 63583), (871, 25258), (949, 23182), (1742, 12629), (1898, 11591), (2249, 9782), (4498, 4891)]