19801960

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3779}}^1$

素因数の和:3921

約数の個数: 32

約数和(自身を含む): 44906400

約数和(自身を除く): 25104440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3779, 5240, 7558, 15116, 18895, 30232, 37790, 75580, 151160, 495049, 990098, 1980196, 2475245, 3960392, 4950490, 9900980, 19801960]

約数ペア:

[(1, 19801960), (2, 9900980), (4, 4950490), (5, 3960392), (8, 2475245), (10, 1980196), (20, 990098), (40, 495049), (131, 151160), (262, 75580), (524, 37790), (655, 30232), (1048, 18895), (1310, 15116), (2620, 7558), (3779, 5240)]