21173265

素因数分解:

$3^3\times 5^1\times {\mathrm{47}}^2\times {\mathrm{71}}^1$

素因数の和:179

約数の個数: 48

約数和(自身を含む): 39000960

約数和(自身を除く): 17827695

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 71, 135, 141, 213, 235, 355, 423, 639, 705, 1065, 1269, 1917, 2115, 2209, 3195, 3337, 6345, 6627, 9585, 10011, 11045, 16685, 19881, 30033, 33135, 50055, 59643, 90099, 99405, 150165, 156839, 298215, 450495, 470517, 784195, 1411551, 2352585, 4234653, 7057755, 21173265]

約数ペア:

[(1, 21173265), (3, 7057755), (5, 4234653), (9, 2352585), (15, 1411551), (27, 784195), (45, 470517), (47, 450495), (71, 298215), (135, 156839), (141, 150165), (213, 99405), (235, 90099), (355, 59643), (423, 50055), (639, 33135), (705, 30033), (1065, 19881), (1269, 16685), (1917, 11045), (2115, 10011), (2209, 9585), (3195, 6627), (3337, 6345)]