21378415

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{1583}}^1$

素因数の和:1698

約数の個数: 16

約数和(自身を含む): 26725248

約数和(自身を除く): 5346833

約数列:

[1, 5, 37, 73, 185, 365, 1583, 2701, 7915, 13505, 58571, 115559, 292855, 577795, 4275683, 21378415]

約数ペア:

[(1, 21378415), (5, 4275683), (37, 577795), (73, 292855), (185, 115559), (365, 58571), (1583, 13505), (2701, 7915)]