21553959

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{293}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 34320384

約数和(自身を除く): 12766425

約数列:

[1, 3, 7, 21, 31, 93, 113, 217, 293, 339, 651, 791, 879, 2051, 2373, 3503, 6153, 9083, 10509, 24521, 27249, 33109, 63581, 73563, 99327, 190743, 231763, 695289, 1026379, 3079137, 7184653, 21553959]

約数ペア:

[(1, 21553959), (3, 7184653), (7, 3079137), (21, 1026379), (31, 695289), (93, 231763), (113, 190743), (217, 99327), (293, 73563), (339, 63581), (651, 33109), (791, 27249), (879, 24521), (2051, 10509), (2373, 9083), (3503, 6153)]