21651420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51551}}^1$

素因数の和:51570

約数の個数: 48

約数和(自身を含む): 69285888

約数和(自身を除く): 47634468

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51551, 103102, 154653, 206204, 257755, 309306, 360857, 515510, 618612, 721714, 773265, 1031020, 1082571, 1443428, 1546530, 1804285, 2165142, 3093060, 3608570, 4330284, 5412855, 7217140, 10825710, 21651420]

約数ペア:

[(1, 21651420), (2, 10825710), (3, 7217140), (4, 5412855), (5, 4330284), (6, 3608570), (7, 3093060), (10, 2165142), (12, 1804285), (14, 1546530), (15, 1443428), (20, 1082571), (21, 1031020), (28, 773265), (30, 721714), (35, 618612), (42, 515510), (60, 360857), (70, 309306), (84, 257755), (105, 206204), (140, 154653), (210, 103102), (420, 51551)]