21059961

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{293}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 32269440

約数和(自身を除く): 11209479

約数列:

[1, 3, 13, 19, 39, 57, 97, 247, 291, 293, 741, 879, 1261, 1843, 3783, 3809, 5529, 5567, 11427, 16701, 23959, 28421, 71877, 72371, 85263, 217113, 369473, 539999, 1108419, 1619997, 7019987, 21059961]

約数ペア:

[(1, 21059961), (3, 7019987), (13, 1619997), (19, 1108419), (39, 539999), (57, 369473), (97, 217113), (247, 85263), (291, 72371), (293, 71877), (741, 28421), (879, 23959), (1261, 16701), (1843, 11427), (3783, 5567), (3809, 5529)]