278360840

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{10657}}^1$

素因数の和:11321

約数の個数: 32

約数和(自身を含む): 627329880

約数和(自身を除く): 348969040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 1306, 2612, 3265, 5224, 6530, 10657, 13060, 21314, 26120, 42628, 53285, 85256, 106570, 213140, 426280, 6959021, 13918042, 27836084, 34795105, 55672168, 69590210, 139180420, 278360840]

約数ペア:

[(1, 278360840), (2, 139180420), (4, 69590210), (5, 55672168), (8, 34795105), (10, 27836084), (20, 13918042), (40, 6959021), (653, 426280), (1306, 213140), (2612, 106570), (3265, 85256), (5224, 53285), (6530, 42628), (10657, 26120), (13060, 21314)]