21078265

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{3907}}^1$

素因数の和:4008

約数の個数: 16

約数和(自身を含む): 27574848

約数和(自身を除く): 6496583

約数列:

[1, 5, 13, 65, 83, 415, 1079, 3907, 5395, 19535, 50791, 253955, 324281, 1621405, 4215653, 21078265]

約数ペア:

[(1, 21078265), (5, 4215653), (13, 1621405), (65, 324281), (83, 253955), (415, 50791), (1079, 19535), (3907, 5395)]