21806585

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 28926720

約数和(自身を除く): 7120135

約数列:

[1, 5, 19, 53, 61, 71, 95, 265, 305, 355, 1007, 1159, 1349, 3233, 3763, 4331, 5035, 5795, 6745, 16165, 18815, 21655, 61427, 71497, 82289, 229543, 307135, 357485, 411445, 1147715, 4361317, 21806585]

約数ペア:

[(1, 21806585), (5, 4361317), (19, 1147715), (53, 411445), (61, 357485), (71, 307135), (95, 229543), (265, 82289), (305, 71497), (355, 61427), (1007, 21655), (1159, 18815), (1349, 16165), (3233, 6745), (3763, 5795), (4331, 5035)]