19772151

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 11331849

約数列:

[1, 3, 7, 21, 71, 89, 149, 213, 267, 447, 497, 623, 1043, 1491, 1869, 3129, 6319, 10579, 13261, 18957, 31737, 39783, 44233, 74053, 92827, 132699, 222159, 278481, 941531, 2824593, 6590717, 19772151]

約数ペア:

[(1, 19772151), (3, 6590717), (7, 2824593), (21, 941531), (71, 278481), (89, 222159), (149, 132699), (213, 92827), (267, 74053), (447, 44233), (497, 39783), (623, 31737), (1043, 18957), (1491, 13261), (1869, 10579), (3129, 6319)]