21056956

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{211}}^1\times {\mathrm{409}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 37723280

約数和(自身を除く): 16666324

約数列:

[1, 2, 4, 61, 122, 211, 244, 409, 422, 818, 844, 1636, 12871, 24949, 25742, 49898, 51484, 86299, 99796, 172598, 345196, 5264239, 10528478, 21056956]

約数ペア:

[(1, 21056956), (2, 10528478), (4, 5264239), (61, 345196), (122, 172598), (211, 99796), (244, 86299), (409, 51484), (422, 49898), (818, 25742), (844, 24949), (1636, 12871)]