20618745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1499}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 38016000

約数和(自身を除く): 17397255

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 131, 393, 655, 917, 1499, 1965, 2751, 4497, 4585, 7495, 10493, 13755, 22485, 31479, 52465, 157395, 196369, 589107, 981845, 1374583, 2945535, 4123749, 6872915, 20618745]

約数ペア:

[(1, 20618745), (3, 6872915), (5, 4123749), (7, 2945535), (15, 1374583), (21, 981845), (35, 589107), (105, 196369), (131, 157395), (393, 52465), (655, 31479), (917, 22485), (1499, 13755), (1965, 10493), (2751, 7495), (4497, 4585)]