21342909

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{359}}^1$

素因数の和:537

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 13217091

約数列:

[1, 3, 7, 19, 21, 57, 133, 149, 359, 399, 447, 1043, 1077, 2513, 2831, 3129, 6821, 7539, 8493, 19817, 20463, 47747, 53491, 59451, 143241, 160473, 374437, 1016329, 1123311, 3048987, 7114303, 21342909]

約数ペア:

[(1, 21342909), (3, 7114303), (7, 3048987), (19, 1123311), (21, 1016329), (57, 374437), (133, 160473), (149, 143241), (359, 59451), (399, 53491), (447, 47747), (1043, 20463), (1077, 19817), (2513, 8493), (2831, 7539), (3129, 6821)]