19869776

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{17491}}^1$

素因数の和:17570

約数の個数: 20

約数和(自身を含む): 39042144

約数和(自身を除く): 19172368

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 17491, 34982, 69964, 139928, 279856, 1241861, 2483722, 4967444, 9934888, 19869776]

約数ペア:

[(1, 19869776), (2, 9934888), (4, 4967444), (8, 2483722), (16, 1241861), (71, 279856), (142, 139928), (284, 69964), (568, 34982), (1136, 17491)]