21985292

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{11059}}^1$

素因数の和:11141

約数の個数: 24

約数和(自身を含む): 44593920

約数和(自身を除く): 22608628

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 11059, 22118, 44236, 77413, 154826, 309652, 785189, 1570378, 3140756, 5496323, 10992646, 21985292]

約数ペア:

[(1, 21985292), (2, 10992646), (4, 5496323), (7, 3140756), (14, 1570378), (28, 785189), (71, 309652), (142, 154826), (284, 77413), (497, 44236), (994, 22118), (1988, 11059)]