131981240

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{13691}}^1$

素因数の和:13943

約数の個数: 32

約数和(自身を含む): 298211760

約数和(自身を除く): 166230520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2410, 4820, 9640, 13691, 27382, 54764, 68455, 109528, 136910, 273820, 547640, 3299531, 6599062, 13198124, 16497655, 26396248, 32995310, 65990620, 131981240]

約数ペア:

[(1, 131981240), (2, 65990620), (4, 32995310), (5, 26396248), (8, 16497655), (10, 13198124), (20, 6599062), (40, 3299531), (241, 547640), (482, 273820), (964, 136910), (1205, 109528), (1928, 68455), (2410, 54764), (4820, 27382), (9640, 13691)]