257987480

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{222403}}^1$

素因数の和:222443

約数の個数: 32

約数和(自身を含む): 600490800

約数和(自身を除く): 342503320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 222403, 444806, 889612, 1112015, 1779224, 2224030, 4448060, 6449687, 8896120, 12899374, 25798748, 32248435, 51597496, 64496870, 128993740, 257987480]

約数ペア:

[(1, 257987480), (2, 128993740), (4, 64496870), (5, 51597496), (8, 32248435), (10, 25798748), (20, 12899374), (29, 8896120), (40, 6449687), (58, 4448060), (116, 2224030), (145, 1779224), (232, 1112015), (290, 889612), (580, 444806), (1160, 222403)]