21145355

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{4993}}^1$

素因数の和:5027

約数の個数: 24

約数和(自身を含む): 31881696

約数和(自身を除く): 10736341

約数列:

[1, 5, 7, 11, 35, 55, 77, 121, 385, 605, 847, 4235, 4993, 24965, 34951, 54923, 174755, 274615, 384461, 604153, 1922305, 3020765, 4229071, 21145355]

約数ペア:

[(1, 21145355), (5, 4229071), (7, 3020765), (11, 1922305), (35, 604153), (55, 384461), (77, 274615), (121, 174755), (385, 54923), (605, 34951), (847, 24965), (4235, 4993)]