21213987

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{383}}^1\times {\mathrm{499}}^1$

素因数の和:922

約数の個数: 16

約数和(自身を含む): 29184000

約数和(自身を除く): 7970013

約数列:

[1, 3, 37, 111, 383, 499, 1149, 1497, 14171, 18463, 42513, 55389, 191117, 573351, 7071329, 21213987]

約数ペア:

[(1, 21213987), (3, 7071329), (37, 573351), (111, 191117), (383, 55389), (499, 42513), (1149, 18463), (1497, 14171)]