256460920

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{221087}}^1$

素因数の和:221127

約数の個数: 32

約数和(自身を含む): 596937600

約数和(自身を除く): 340476680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 221087, 442174, 884348, 1105435, 1768696, 2210870, 4421740, 6411523, 8843480, 12823046, 25646092, 32057615, 51292184, 64115230, 128230460, 256460920]

約数ペア:

[(1, 256460920), (2, 128230460), (4, 64115230), (5, 51292184), (8, 32057615), (10, 25646092), (20, 12823046), (29, 8843480), (40, 6411523), (58, 4421740), (116, 2210870), (145, 1768696), (232, 1105435), (290, 884348), (580, 442174), (1160, 221087)]