121691720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{509}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 282744000

約数和(自身を除く): 161052280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 139, 172, 215, 278, 344, 430, 509, 556, 695, 860, 1018, 1112, 1390, 1720, 2036, 2545, 2780, 4072, 5090, 5560, 5977, 10180, 11954, 20360, 21887, 23908, 29885, 43774, 47816, 59770, 70751, 87548, 109435, 119540, 141502, 175096, 218870, 239080, 283004, 353755, 437740, 566008, 707510, 875480, 1415020, 2830040, 3042293, 6084586, 12169172, 15211465, 24338344, 30422930, 60845860, 121691720]

約数ペア:

[(1, 121691720), (2, 60845860), (4, 30422930), (5, 24338344), (8, 15211465), (10, 12169172), (20, 6084586), (40, 3042293), (43, 2830040), (86, 1415020), (139, 875480), (172, 707510), (215, 566008), (278, 437740), (344, 353755), (430, 283004), (509, 239080), (556, 218870), (695, 175096), (860, 141502), (1018, 119540), (1112, 109435), (1390, 87548), (1720, 70751), (2036, 59770), (2545, 47816), (2780, 43774), (4072, 29885), (5090, 23908), (5560, 21887), (5977, 20360), (10180, 11954)]