21631780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13691}}^1$

素因数の和:13779

約数の個数: 24

約数和(自身を含む): 46005120

約数和(自身を除く): 24373340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13691, 27382, 54764, 68455, 136910, 273820, 1081589, 2163178, 4326356, 5407945, 10815890, 21631780]

約数ペア:

[(1, 21631780), (2, 10815890), (4, 5407945), (5, 4326356), (10, 2163178), (20, 1081589), (79, 273820), (158, 136910), (316, 68455), (395, 54764), (790, 27382), (1580, 13691)]