20864818

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 37068696

約数和(自身を除く): 16203878

約数列:

[1, 2, 13, 23, 26, 37, 41, 46, 74, 82, 299, 481, 529, 533, 598, 851, 943, 962, 1058, 1066, 1517, 1702, 1886, 3034, 6877, 11063, 12259, 13754, 19573, 19721, 21689, 22126, 24518, 34891, 39146, 39442, 43378, 69782, 254449, 281957, 453583, 508898, 563914, 802493, 907166, 1604986, 10432409, 20864818]

約数ペア:

[(1, 20864818), (2, 10432409), (13, 1604986), (23, 907166), (26, 802493), (37, 563914), (41, 508898), (46, 453583), (74, 281957), (82, 254449), (299, 69782), (481, 43378), (529, 39442), (533, 39146), (598, 34891), (851, 24518), (943, 22126), (962, 21689), (1058, 19721), (1066, 19573), (1517, 13754), (1702, 12259), (1886, 11063), (3034, 6877)]