21209732

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{1031}}^1$

素因数の和:1211

約数の個数: 24

約数和(自身を含む): 38431680

約数和(自身を除く): 17221948

約数列:

[1, 2, 4, 37, 74, 139, 148, 278, 556, 1031, 2062, 4124, 5143, 10286, 20572, 38147, 76294, 143309, 152588, 286618, 573236, 5302433, 10604866, 21209732]

約数ペア:

[(1, 21209732), (2, 10604866), (4, 5302433), (37, 573236), (74, 286618), (139, 152588), (148, 143309), (278, 76294), (556, 38147), (1031, 20572), (2062, 10286), (4124, 5143)]