12904240

素因数分解:

$2^4\times 5^1\times {\mathrm{161303}}^1$

素因数の和:161316

約数の個数: 20

約数和(自身を含む): 30002544

約数和(自身を除く): 17098304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161303, 322606, 645212, 806515, 1290424, 1613030, 2580848, 3226060, 6452120, 12904240]

約数ペア:

[(1, 12904240), (2, 6452120), (4, 3226060), (5, 2580848), (8, 1613030), (10, 1290424), (16, 806515), (20, 645212), (40, 322606), (80, 161303)]