21709639

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{769}}^1$

素因数の和:922

約数の個数: 16

約数和(自身を含む): 25748800

約数和(自身を除く): 4039161

約数列:

[1, 7, 37, 109, 259, 763, 769, 4033, 5383, 28231, 28453, 83821, 199171, 586747, 3101377, 21709639]

約数ペア:

[(1, 21709639), (7, 3101377), (37, 586747), (109, 199171), (259, 83821), (763, 28453), (769, 28231), (4033, 5383)]