21329781

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{197}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 33187968

約数和(自身を除く): 11858187

約数列:

[1, 3, 11, 17, 33, 51, 187, 193, 197, 561, 579, 591, 2123, 2167, 3281, 3349, 6369, 6501, 9843, 10047, 36091, 36839, 38021, 108273, 110517, 114063, 418231, 646357, 1254693, 1939071, 7109927, 21329781]

約数ペア:

[(1, 21329781), (3, 7109927), (11, 1939071), (17, 1254693), (33, 646357), (51, 418231), (187, 114063), (193, 110517), (197, 108273), (561, 38021), (579, 36839), (591, 36091), (2123, 10047), (2167, 9843), (3281, 6501), (3349, 6369)]