20870811

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{613}}^1$

素因数の和:732

約数の個数: 32

約数和(自身を含む): 33696320

約数和(自身を除く): 12825509

約数列:

[1, 3, 9, 13, 27, 39, 97, 117, 291, 351, 613, 873, 1261, 1839, 2619, 3783, 5517, 7969, 11349, 16551, 23907, 34047, 59461, 71721, 178383, 215163, 535149, 772993, 1605447, 2318979, 6956937, 20870811]

約数ペア:

[(1, 20870811), (3, 6956937), (9, 2318979), (13, 1605447), (27, 772993), (39, 535149), (97, 215163), (117, 178383), (291, 71721), (351, 59461), (613, 34047), (873, 23907), (1261, 16551), (1839, 11349), (2619, 7969), (3783, 5517)]