20820933

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1523}}^1$

素因数の和:1574

約数の個数: 36

約数和(自身を含む): 36137088

約数和(自身を除く): 15316155

約数列:

[1, 3, 7, 9, 21, 31, 49, 63, 93, 147, 217, 279, 441, 651, 1519, 1523, 1953, 4557, 4569, 10661, 13671, 13707, 31983, 47213, 74627, 95949, 141639, 223881, 330491, 424917, 671643, 991473, 2313437, 2974419, 6940311, 20820933]

約数ペア:

[(1, 20820933), (3, 6940311), (7, 2974419), (9, 2313437), (21, 991473), (31, 671643), (49, 424917), (63, 330491), (93, 223881), (147, 141639), (217, 95949), (279, 74627), (441, 47213), (651, 31983), (1519, 13707), (1523, 13671), (1953, 10661), (4557, 4569)]