21197840

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9137}}^1$

素因数の和:9179

約数の個数: 40

約数和(自身を含む): 50990040

約数和(自身を除く): 29792200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9137, 18274, 36548, 45685, 73096, 91370, 146192, 182740, 264973, 365480, 529946, 730960, 1059892, 1324865, 2119784, 2649730, 4239568, 5299460, 10598920, 21197840]

約数ペア:

[(1, 21197840), (2, 10598920), (4, 5299460), (5, 4239568), (8, 2649730), (10, 2119784), (16, 1324865), (20, 1059892), (29, 730960), (40, 529946), (58, 365480), (80, 264973), (116, 182740), (145, 146192), (232, 91370), (290, 73096), (464, 45685), (580, 36548), (1160, 18274), (2320, 9137)]