21149804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{4027}}^1$

素因数の和:4145

約数の個数: 24

約数和(自身を含む): 40263888

約数和(自身を除く): 19114084

約数列:

[1, 2, 4, 13, 26, 52, 101, 202, 404, 1313, 2626, 4027, 5252, 8054, 16108, 52351, 104702, 209404, 406727, 813454, 1626908, 5287451, 10574902, 21149804]

約数ペア:

[(1, 21149804), (2, 10574902), (4, 5287451), (13, 1626908), (26, 813454), (52, 406727), (101, 209404), (202, 104702), (404, 52351), (1313, 16108), (2626, 8054), (4027, 5252)]