258771880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{208687}}^1$

素因数の和:208729

約数の個数: 32

約数和(自身を含む): 601021440

約数和(自身を除く): 342249560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 208687, 417374, 834748, 1043435, 1669496, 2086870, 4173740, 6469297, 8347480, 12938594, 25877188, 32346485, 51754376, 64692970, 129385940, 258771880]

約数ペア:

[(1, 258771880), (2, 129385940), (4, 64692970), (5, 51754376), (8, 32346485), (10, 25877188), (20, 12938594), (31, 8347480), (40, 6469297), (62, 4173740), (124, 2086870), (155, 1669496), (248, 1043435), (310, 834748), (620, 417374), (1240, 208687)]