20199921

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{809}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 12459279

約数列:

[1, 3, 7, 21, 29, 41, 87, 123, 203, 287, 609, 809, 861, 1189, 2427, 3567, 5663, 8323, 16989, 23461, 24969, 33169, 70383, 99507, 164227, 232183, 492681, 696549, 961901, 2885703, 6733307, 20199921]

約数ペア:

[(1, 20199921), (3, 6733307), (7, 2885703), (21, 961901), (29, 696549), (41, 492681), (87, 232183), (123, 164227), (203, 99507), (287, 70383), (609, 33169), (809, 24969), (861, 23461), (1189, 16989), (2427, 8323), (3567, 5663)]