21539817

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{563}}^1$

素因数の和:694

約数の個数: 32

約数和(自身を含む): 34742400

約数和(自身を除く): 13202583

約数列:

[1, 3, 9, 13, 27, 39, 109, 117, 327, 351, 563, 981, 1417, 1689, 2943, 4251, 5067, 7319, 12753, 15201, 21957, 38259, 61367, 65871, 184101, 197613, 552303, 797771, 1656909, 2393313, 7179939, 21539817]

約数ペア:

[(1, 21539817), (3, 7179939), (9, 2393313), (13, 1656909), (27, 797771), (39, 552303), (109, 197613), (117, 184101), (327, 65871), (351, 61367), (563, 38259), (981, 21957), (1417, 15201), (1689, 12753), (2943, 7319), (4251, 5067)]