28121751

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{6287}}^1$

素因数の和:6371

約数の個数: 24

約数和(自身を含む): 47084544

約数和(自身を除く): 18962793

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 6287, 18861, 44009, 56583, 132027, 396081, 446377, 1339131, 3124639, 4017393, 9373917, 28121751]

約数ペア:

[(1, 28121751), (3, 9373917), (7, 4017393), (9, 3124639), (21, 1339131), (63, 446377), (71, 396081), (213, 132027), (497, 56583), (639, 44009), (1491, 18861), (4473, 6287)]