20984770

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{263}}^1$

素因数の和:450

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 17791550

約数列:

[1, 2, 5, 10, 79, 101, 158, 202, 263, 395, 505, 526, 790, 1010, 1315, 2630, 7979, 15958, 20777, 26563, 39895, 41554, 53126, 79790, 103885, 132815, 207770, 265630, 2098477, 4196954, 10492385, 20984770]

約数ペア:

[(1, 20984770), (2, 10492385), (5, 4196954), (10, 2098477), (79, 265630), (101, 207770), (158, 132815), (202, 103885), (263, 79790), (395, 53126), (505, 41554), (526, 39895), (790, 26563), (1010, 20777), (1315, 15958), (2630, 7979)]