678808520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1305401}}^1$

素因数の和:1305425

約数の個数: 32

約数和(自身を含む): 1644806520

約数和(自身を除く): 965998000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1305401, 2610802, 5221604, 6527005, 10443208, 13054010, 16970213, 26108020, 33940426, 52216040, 67880852, 84851065, 135761704, 169702130, 339404260, 678808520]

約数ペア:

[(1, 678808520), (2, 339404260), (4, 169702130), (5, 135761704), (8, 84851065), (10, 67880852), (13, 52216040), (20, 33940426), (26, 26108020), (40, 16970213), (52, 13054010), (65, 10443208), (104, 6527005), (130, 5221604), (260, 2610802), (520, 1305401)]