21455301

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{521}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 34276608

約数和(自身を除く): 12821307

約数列:

[1, 3, 7, 21, 37, 53, 111, 159, 259, 371, 521, 777, 1113, 1563, 1961, 3647, 5883, 10941, 13727, 19277, 27613, 41181, 57831, 82839, 134939, 193291, 404817, 579873, 1021681, 3065043, 7151767, 21455301]

約数ペア:

[(1, 21455301), (3, 7151767), (7, 3065043), (21, 1021681), (37, 579873), (53, 404817), (111, 193291), (159, 134939), (259, 82839), (371, 57831), (521, 41181), (777, 27613), (1113, 19277), (1563, 13727), (1961, 10941), (3647, 5883)]