21025005

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{2011}}^1$

素因数の和:2077

約数の個数: 32

約数和(自身を含む): 36505728

約数和(自身を除く): 15480723

約数列:

[1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 2011, 2091, 3485, 6033, 10055, 10455, 30165, 34187, 82451, 102561, 170935, 247353, 412255, 512805, 1236765, 1401667, 4205001, 7008335, 21025005]

約数ペア:

[(1, 21025005), (3, 7008335), (5, 4205001), (15, 1401667), (17, 1236765), (41, 512805), (51, 412255), (85, 247353), (123, 170935), (205, 102561), (255, 82451), (615, 34187), (697, 30165), (2011, 10455), (2091, 10055), (3485, 6033)]