21277465

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7752935

約数列:

[1, 5, 11, 55, 59, 79, 83, 295, 395, 415, 649, 869, 913, 3245, 4345, 4565, 4661, 4897, 6557, 23305, 24485, 32785, 51271, 53867, 72127, 256355, 269335, 360635, 386863, 1934315, 4255493, 21277465]

約数ペア:

[(1, 21277465), (5, 4255493), (11, 1934315), (55, 386863), (59, 360635), (79, 269335), (83, 256355), (295, 72127), (395, 53867), (415, 51271), (649, 32785), (869, 24485), (913, 23305), (3245, 6557), (4345, 4897), (4565, 4661)]