20840085

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7351}}^1$

素因数の和:7375

約数の個数: 40

約数和(自身を含む): 42700416

約数和(自身を除く): 21860331

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7351, 22053, 36755, 51457, 66159, 110265, 154371, 198477, 257285, 330795, 463113, 595431, 771855, 992385, 1389339, 2315565, 2977155, 4168017, 6946695, 20840085]

約数ペア:

[(1, 20840085), (3, 6946695), (5, 4168017), (7, 2977155), (9, 2315565), (15, 1389339), (21, 992385), (27, 771855), (35, 595431), (45, 463113), (63, 330795), (81, 257285), (105, 198477), (135, 154371), (189, 110265), (315, 66159), (405, 51457), (567, 36755), (945, 22053), (2835, 7351)]