21049545

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{661}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 36987264

約数和(自身を除く): 15937719

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 193, 579, 661, 965, 1983, 2123, 2895, 3305, 6369, 7271, 9915, 10615, 21813, 31845, 36355, 109065, 127573, 382719, 637865, 1403303, 1913595, 4209909, 7016515, 21049545]

約数ペア:

[(1, 21049545), (3, 7016515), (5, 4209909), (11, 1913595), (15, 1403303), (33, 637865), (55, 382719), (165, 127573), (193, 109065), (579, 36355), (661, 31845), (965, 21813), (1983, 10615), (2123, 9915), (2895, 7271), (3305, 6369)]