19915371

素因数分解:

$3^2\times 7^1\times {\mathrm{347}}^1\times {\mathrm{911}}^1$

素因数の和:1271

約数の個数: 24

約数和(自身を含む): 33007104

約数和(自身を除く): 13091733

約数列:

[1, 3, 7, 9, 21, 63, 347, 911, 1041, 2429, 2733, 3123, 6377, 7287, 8199, 19131, 21861, 57393, 316117, 948351, 2212819, 2845053, 6638457, 19915371]

約数ペア:

[(1, 19915371), (3, 6638457), (7, 2845053), (9, 2212819), (21, 948351), (63, 316117), (347, 57393), (911, 21861), (1041, 19131), (2429, 8199), (2733, 7287), (3123, 6377)]