257500520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{105533}}^1$

素因数の和:105605

約数の個数: 32

約数和(自身を含む): 588879720

約数和(自身を除く): 331379200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 105533, 211066, 422132, 527665, 844264, 1055330, 2110660, 4221320, 6437513, 12875026, 25750052, 32187565, 51500104, 64375130, 128750260, 257500520]

約数ペア:

[(1, 257500520), (2, 128750260), (4, 64375130), (5, 51500104), (8, 32187565), (10, 25750052), (20, 12875026), (40, 6437513), (61, 4221320), (122, 2110660), (244, 1055330), (305, 844264), (488, 527665), (610, 422132), (1220, 211066), (2440, 105533)]