21385319

素因数分解:

${\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:398

約数の個数: 16

約数和(自身を含む): 23046144

約数和(自身を除く): 1660825

約数列:

[1, 31, 43, 61, 263, 1333, 1891, 2623, 8153, 11309, 16043, 81313, 350579, 497333, 689849, 21385319]

約数ペア:

[(1, 21385319), (31, 689849), (43, 497333), (61, 350579), (263, 81313), (1333, 16043), (1891, 11309), (2623, 8153)]