257556880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{459923}}^1$

素因数の和:459943

約数の個数: 40

約数和(自身を含む): 684366912

約数和(自身を除く): 426810032

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 459923, 919846, 1839692, 2299615, 3219461, 3679384, 4599230, 6438922, 7358768, 9198460, 12877844, 16097305, 18396920, 25755688, 32194610, 36793840, 51511376, 64389220, 128778440, 257556880]

約数ペア:

[(1, 257556880), (2, 128778440), (4, 64389220), (5, 51511376), (7, 36793840), (8, 32194610), (10, 25755688), (14, 18396920), (16, 16097305), (20, 12877844), (28, 9198460), (35, 7358768), (40, 6438922), (56, 4599230), (70, 3679384), (80, 3219461), (112, 2299615), (140, 1839692), (280, 919846), (560, 459923)]