21140464

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{353}}^1$

素因数の和:577

約数の個数: 40

約数和(自身を含む): 43457040

約数和(自身を除く): 22316576

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 197, 304, 353, 394, 706, 788, 1412, 1576, 2824, 3152, 3743, 5648, 6707, 7486, 13414, 14972, 26828, 29944, 53656, 59888, 69541, 107312, 139082, 278164, 556328, 1112656, 1321279, 2642558, 5285116, 10570232, 21140464]

約数ペア:

[(1, 21140464), (2, 10570232), (4, 5285116), (8, 2642558), (16, 1321279), (19, 1112656), (38, 556328), (76, 278164), (152, 139082), (197, 107312), (304, 69541), (353, 59888), (394, 53656), (706, 29944), (788, 26828), (1412, 14972), (1576, 13414), (2824, 7486), (3152, 6707), (3743, 5648)]