21913353

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{307}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 39975936

約数和(自身を除く): 18062583

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 103, 231, 307, 309, 693, 721, 921, 927, 1133, 2149, 2163, 2763, 3377, 3399, 6447, 6489, 7931, 10131, 10197, 19341, 23639, 23793, 30393, 31621, 70917, 71379, 94863, 212751, 221347, 284589, 347831, 664041, 1043493, 1992123, 2434817, 3130479, 7304451, 21913353]

約数ペア:

[(1, 21913353), (3, 7304451), (7, 3130479), (9, 2434817), (11, 1992123), (21, 1043493), (33, 664041), (63, 347831), (77, 284589), (99, 221347), (103, 212751), (231, 94863), (307, 71379), (309, 70917), (693, 31621), (721, 30393), (921, 23793), (927, 23639), (1133, 19341), (2149, 10197), (2163, 10131), (2763, 7931), (3377, 6489), (3399, 6447)]