21497913

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:326

約数の個数: 32

約数和(自身を含む): 33022080

約数和(自身を除く): 11524167

約数列:

[1, 3, 9, 27, 53, 83, 159, 181, 249, 477, 543, 747, 1431, 1629, 2241, 4399, 4887, 9593, 13197, 15023, 28779, 39591, 45069, 86337, 118773, 135207, 259011, 405621, 796219, 2388657, 7165971, 21497913]

約数ペア:

[(1, 21497913), (3, 7165971), (9, 2388657), (27, 796219), (53, 405621), (83, 259011), (159, 135207), (181, 118773), (249, 86337), (477, 45069), (543, 39591), (747, 28779), (1431, 15023), (1629, 13197), (2241, 9593), (4399, 4887)]