19900012

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{4391}}^1$

素因数の和:4509

約数の個数: 24

約数和(自身を含む): 38368512

約数和(自身を除く): 18468500

約数列:

[1, 2, 4, 11, 22, 44, 103, 206, 412, 1133, 2266, 4391, 4532, 8782, 17564, 48301, 96602, 193204, 452273, 904546, 1809092, 4975003, 9950006, 19900012]

約数ペア:

[(1, 19900012), (2, 9950006), (4, 4975003), (11, 1809092), (22, 904546), (44, 452273), (103, 193204), (206, 96602), (412, 48301), (1133, 17564), (2266, 8782), (4391, 4532)]