21487915

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{3463}}^1$

素因数の和:3558

約数の個数: 16

約数和(自身を含む): 27684288

約数和(自身を除く): 6196373

約数列:

[1, 5, 17, 73, 85, 365, 1241, 3463, 6205, 17315, 58871, 252799, 294355, 1263995, 4297583, 21487915]

約数ペア:

[(1, 21487915), (5, 4297583), (17, 1263995), (73, 294355), (85, 252799), (365, 58871), (1241, 17315), (3463, 6205)]