21201481

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{751}}^1$

素因数の和:904

約数の個数: 16

約数和(自身を含む): 25146880

約数和(自身を除く): 3945399

約数列:

[1, 7, 37, 109, 259, 751, 763, 4033, 5257, 27787, 28231, 81859, 194509, 573013, 3028783, 21201481]

約数ペア:

[(1, 21201481), (7, 3028783), (37, 573013), (109, 194509), (259, 81859), (751, 28231), (763, 27787), (4033, 5257)]