21721579

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2417}}^1$

素因数の和:2490

約数の個数: 16

約数和(自身を含む): 25534080

約数和(自身を除く): 3812501

約数列:

[1, 11, 19, 43, 209, 473, 817, 2417, 8987, 26587, 45923, 103931, 505153, 1143241, 1974689, 21721579]

約数ペア:

[(1, 21721579), (11, 1974689), (19, 1143241), (43, 505153), (209, 103931), (473, 45923), (817, 26587), (2417, 8987)]