21304855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{359}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 9177065

約数列:

[1, 5, 11, 13, 55, 65, 83, 143, 359, 415, 715, 913, 1079, 1795, 3949, 4565, 4667, 5395, 11869, 19745, 23335, 29797, 51337, 59345, 148985, 256685, 327767, 387361, 1638835, 1936805, 4260971, 21304855]

約数ペア:

[(1, 21304855), (5, 4260971), (11, 1936805), (13, 1638835), (55, 387361), (65, 327767), (83, 256685), (143, 148985), (359, 59345), (415, 51337), (715, 29797), (913, 23335), (1079, 19745), (1795, 11869), (3949, 5395), (4565, 4667)]