1971980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2293}}^1$

素因数の和:2345

約数の個数: 24

約数和(自身を含む): 4239312

約数和(自身を除く): 2267332

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 2293, 4586, 9172, 11465, 22930, 45860, 98599, 197198, 394396, 492995, 985990, 1971980]

約数ペア:

[(1, 1971980), (2, 985990), (4, 492995), (5, 394396), (10, 197198), (20, 98599), (43, 45860), (86, 22930), (172, 11465), (215, 9172), (430, 4586), (860, 2293)]