256542780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{328901}}^1$

素因数の和:328926

約数の個数: 48

約数和(自身を含む): 773577504

約数和(自身を除く): 517034724

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 328901, 657802, 986703, 1315604, 1644505, 1973406, 3289010, 3946812, 4275713, 4933515, 6578020, 8551426, 9867030, 12827139, 17102852, 19734060, 21378565, 25654278, 42757130, 51308556, 64135695, 85514260, 128271390, 256542780]

約数ペア:

[(1, 256542780), (2, 128271390), (3, 85514260), (4, 64135695), (5, 51308556), (6, 42757130), (10, 25654278), (12, 21378565), (13, 19734060), (15, 17102852), (20, 12827139), (26, 9867030), (30, 8551426), (39, 6578020), (52, 4933515), (60, 4275713), (65, 3946812), (78, 3289010), (130, 1973406), (156, 1644505), (195, 1315604), (260, 986703), (390, 657802), (780, 328901)]