19980821488

素因数分解:

$2^4\times {\mathrm{7741}}^1\times {\mathrm{161323}}^1$

素因数の和:169072

約数の個数: 20

約数和(自身を含む): 38718082648

約数和(自身を除く): 18737261160

約数列:

[1, 2, 4, 8, 16, 7741, 15482, 30964, 61928, 123856, 161323, 322646, 645292, 1290584, 2581168, 1248801343, 2497602686, 4995205372, 9990410744, 19980821488]

約数ペア:

[(1, 19980821488), (2, 9990410744), (4, 4995205372), (8, 2497602686), (16, 1248801343), (7741, 2581168), (15482, 1290584), (30964, 645292), (61928, 322646), (123856, 161323)]