20405968

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^2$

素因数の和:184

約数の個数: 60

約数和(自身を含む): 45648864

約数和(自身を除く): 25242896

約数列:

[1, 2, 4, 8, 11, 16, 22, 23, 44, 46, 71, 88, 92, 142, 176, 184, 253, 284, 368, 506, 568, 781, 1012, 1136, 1562, 1633, 2024, 3124, 3266, 4048, 5041, 6248, 6532, 10082, 12496, 13064, 17963, 20164, 26128, 35926, 40328, 55451, 71852, 80656, 110902, 115943, 143704, 221804, 231886, 287408, 443608, 463772, 887216, 927544, 1275373, 1855088, 2550746, 5101492, 10202984, 20405968]

約数ペア:

[(1, 20405968), (2, 10202984), (4, 5101492), (8, 2550746), (11, 1855088), (16, 1275373), (22, 927544), (23, 887216), (44, 463772), (46, 443608), (71, 287408), (88, 231886), (92, 221804), (142, 143704), (176, 115943), (184, 110902), (253, 80656), (284, 71852), (368, 55451), (506, 40328), (568, 35926), (781, 26128), (1012, 20164), (1136, 17963), (1562, 13064), (1633, 12496), (2024, 10082), (3124, 6532), (3266, 6248), (4048, 5041)]