28213820

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{4507}}^1$

素因数の和:4829

約数の個数: 24

約数和(自身を含む): 59451504

約数和(自身を除く): 31237684

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 4507, 6260, 9014, 18028, 22535, 45070, 90140, 1410691, 2821382, 5642764, 7053455, 14106910, 28213820]

約数ペア:

[(1, 28213820), (2, 14106910), (4, 7053455), (5, 5642764), (10, 2821382), (20, 1410691), (313, 90140), (626, 45070), (1252, 22535), (1565, 18028), (3130, 9014), (4507, 6260)]