21397878

素因数分解:

$2^1\times 3^3\times {\mathrm{47}}^1\times {\mathrm{8431}}^1$

素因数の和:8489

約数の個数: 32

約数和(自身を含む): 48568320

約数和(自身を除く): 27170442

約数列:

[1, 2, 3, 6, 9, 18, 27, 47, 54, 94, 141, 282, 423, 846, 1269, 2538, 8431, 16862, 25293, 50586, 75879, 151758, 227637, 396257, 455274, 792514, 1188771, 2377542, 3566313, 7132626, 10698939, 21397878]

約数ペア:

[(1, 21397878), (2, 10698939), (3, 7132626), (6, 3566313), (9, 2377542), (18, 1188771), (27, 792514), (47, 455274), (54, 396257), (94, 227637), (141, 151758), (282, 75879), (423, 50586), (846, 25293), (1269, 16862), (2538, 8431)]