20696890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1123}}^1$

素因数の和:1246

約数の個数: 32

約数和(自身を含む): 39654720

約数和(自身を除く): 18957830

約数列:

[1, 2, 5, 10, 19, 38, 95, 97, 190, 194, 485, 970, 1123, 1843, 2246, 3686, 5615, 9215, 11230, 18430, 21337, 42674, 106685, 108931, 213370, 217862, 544655, 1089310, 2069689, 4139378, 10348445, 20696890]

約数ペア:

[(1, 20696890), (2, 10348445), (5, 4139378), (10, 2069689), (19, 1089310), (38, 544655), (95, 217862), (97, 213370), (190, 108931), (194, 106685), (485, 42674), (970, 21337), (1123, 18430), (1843, 11230), (2246, 9215), (3686, 5615)]