19720071

素因数分解:

$3^3\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1013}}^1$

素因数の和:1132

約数の個数: 32

約数和(自身を含む): 33745920

約数和(自身を除く): 14025849

約数列:

[1, 3, 7, 9, 21, 27, 63, 103, 189, 309, 721, 927, 1013, 2163, 2781, 3039, 6489, 7091, 9117, 19467, 21273, 27351, 63819, 104339, 191457, 313017, 730373, 939051, 2191119, 2817153, 6573357, 19720071]

約数ペア:

[(1, 19720071), (3, 6573357), (7, 2817153), (9, 2191119), (21, 939051), (27, 730373), (63, 313017), (103, 191457), (189, 104339), (309, 63819), (721, 27351), (927, 21273), (1013, 19467), (2163, 9117), (2781, 7091), (3039, 6489)]