19919620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{541}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 48077568

約数和(自身を除く): 28157948

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 263, 526, 541, 1052, 1082, 1315, 1841, 2164, 2630, 2705, 3682, 3787, 5260, 5410, 7364, 7574, 9205, 10820, 15148, 18410, 18935, 36820, 37870, 75740, 142283, 284566, 569132, 711415, 995981, 1422830, 1991962, 2845660, 3983924, 4979905, 9959810, 19919620]

約数ペア:

[(1, 19919620), (2, 9959810), (4, 4979905), (5, 3983924), (7, 2845660), (10, 1991962), (14, 1422830), (20, 995981), (28, 711415), (35, 569132), (70, 284566), (140, 142283), (263, 75740), (526, 37870), (541, 36820), (1052, 18935), (1082, 18410), (1315, 15148), (1841, 10820), (2164, 9205), (2630, 7574), (2705, 7364), (3682, 5410), (3787, 5260)]