249953730

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{640907}}^1$

素因数の和:640930

約数の個数: 32

約数和(自身を含む): 646035264

約数和(自身を除く): 396081534

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 640907, 1281814, 1922721, 3204535, 3845442, 6409070, 8331791, 9613605, 16663582, 19227210, 24995373, 41658955, 49990746, 83317910, 124976865, 249953730]

約数ペア:

[(1, 249953730), (2, 124976865), (3, 83317910), (5, 49990746), (6, 41658955), (10, 24995373), (13, 19227210), (15, 16663582), (26, 9613605), (30, 8331791), (39, 6409070), (65, 3845442), (78, 3204535), (130, 1922721), (195, 1281814), (390, 640907)]