21031868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{443}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 43860096

約数和(自身を除く): 22828228

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 83, 143, 166, 286, 332, 443, 572, 886, 913, 1079, 1772, 1826, 2158, 3652, 4316, 4873, 5759, 9746, 11518, 11869, 19492, 23036, 23738, 36769, 47476, 63349, 73538, 126698, 147076, 253396, 404459, 477997, 808918, 955994, 1617836, 1911988, 5257967, 10515934, 21031868]

約数ペア:

[(1, 21031868), (2, 10515934), (4, 5257967), (11, 1911988), (13, 1617836), (22, 955994), (26, 808918), (44, 477997), (52, 404459), (83, 253396), (143, 147076), (166, 126698), (286, 73538), (332, 63349), (443, 47476), (572, 36769), (886, 23738), (913, 23036), (1079, 19492), (1772, 11869), (1826, 11518), (2158, 9746), (3652, 5759), (4316, 4873)]