21907405

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 7703603

約数列:

[1, 5, 13, 47, 65, 71, 101, 235, 355, 505, 611, 923, 1313, 3055, 3337, 4615, 4747, 6565, 7171, 16685, 23735, 35855, 43381, 61711, 93223, 216905, 308555, 337037, 466115, 1685185, 4381481, 21907405]

約数ペア:

[(1, 21907405), (5, 4381481), (13, 1685185), (47, 466115), (65, 337037), (71, 308555), (101, 216905), (235, 93223), (355, 61711), (505, 43381), (611, 35855), (923, 23735), (1313, 16685), (3055, 7171), (3337, 6565), (4615, 4747)]