289755440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{278611}}^1$

素因数の和:278637

約数の個数: 40

約数和(自身を含む): 725505648

約数和(自身を除く): 435750208

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 278611, 557222, 1114444, 1393055, 2228888, 2786110, 3621943, 4457776, 5572220, 7243886, 11144440, 14487772, 18109715, 22288880, 28975544, 36219430, 57951088, 72438860, 144877720, 289755440]

約数ペア:

[(1, 289755440), (2, 144877720), (4, 72438860), (5, 57951088), (8, 36219430), (10, 28975544), (13, 22288880), (16, 18109715), (20, 14487772), (26, 11144440), (40, 7243886), (52, 5572220), (65, 4457776), (80, 3621943), (104, 2786110), (130, 2228888), (208, 1393055), (260, 1114444), (520, 557222), (1040, 278611)]