21490245

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{22741}}^1$

素因数の和:22762

約数の個数: 32

約数和(自身を含む): 43664640

約数和(自身を除く): 22174395

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 22741, 68223, 113705, 159187, 204669, 341115, 477561, 614007, 795935, 1023345, 1432683, 2387805, 3070035, 4298049, 7163415, 21490245]

約数ペア:

[(1, 21490245), (3, 7163415), (5, 4298049), (7, 3070035), (9, 2387805), (15, 1432683), (21, 1023345), (27, 795935), (35, 614007), (45, 477561), (63, 341115), (105, 204669), (135, 159187), (189, 113705), (315, 68223), (945, 22741)]