257718630

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{660817}}^1$

素因数の和:660840

約数の個数: 32

約数和(自身を含む): 666104544

約数和(自身を除く): 408385914

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 660817, 1321634, 1982451, 3304085, 3964902, 6608170, 8590621, 9912255, 17181242, 19824510, 25771863, 42953105, 51543726, 85906210, 128859315, 257718630]

約数ペア:

[(1, 257718630), (2, 128859315), (3, 85906210), (5, 51543726), (6, 42953105), (10, 25771863), (13, 19824510), (15, 17181242), (26, 9912255), (30, 8590621), (39, 6608170), (65, 3964902), (78, 3304085), (130, 1982451), (195, 1321634), (390, 660817)]