820676870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{7901}}^1$

素因数の和:7985

約数の個数: 64

約数和(自身を含む): 1720486656

約数和(自身を除く): 899809786

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 47, 65, 85, 94, 130, 170, 221, 235, 442, 470, 611, 799, 1105, 1222, 1598, 2210, 3055, 3995, 6110, 7901, 7990, 10387, 15802, 20774, 39505, 51935, 79010, 102713, 103870, 134317, 205426, 268634, 371347, 513565, 671585, 742694, 1027130, 1343170, 1746121, 1856735, 3492242, 3713470, 4827511, 6312899, 8730605, 9655022, 12625798, 17461210, 24137555, 31564495, 48275110, 63128990, 82067687, 164135374, 410338435, 820676870]

約数ペア:

[(1, 820676870), (2, 410338435), (5, 164135374), (10, 82067687), (13, 63128990), (17, 48275110), (26, 31564495), (34, 24137555), (47, 17461210), (65, 12625798), (85, 9655022), (94, 8730605), (130, 6312899), (170, 4827511), (221, 3713470), (235, 3492242), (442, 1856735), (470, 1746121), (611, 1343170), (799, 1027130), (1105, 742694), (1222, 671585), (1598, 513565), (2210, 371347), (3055, 268634), (3995, 205426), (6110, 134317), (7901, 103870), (7990, 102713), (10387, 79010), (15802, 51935), (20774, 39505)]