21061917

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{727}}^1$

素因数の和:802

約数の個数: 32

約数和(自身を含む): 33196800

約数和(自身を除く): 12134883

約数列:

[1, 3, 9, 27, 29, 37, 87, 111, 261, 333, 727, 783, 999, 1073, 2181, 3219, 6543, 9657, 19629, 21083, 26899, 28971, 63249, 80697, 189747, 242091, 569241, 726273, 780071, 2340213, 7020639, 21061917]

約数ペア:

[(1, 21061917), (3, 7020639), (9, 2340213), (27, 780071), (29, 726273), (37, 569241), (87, 242091), (111, 189747), (261, 80697), (333, 63249), (727, 28971), (783, 26899), (999, 21083), (1073, 19629), (2181, 9657), (3219, 6543)]