20005640

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1511}}^1$

素因数の和:1853

約数の個数: 32

約数和(自身を含む): 45178560

約数和(自身を除く): 25172920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1511, 1655, 2648, 3022, 3310, 6044, 6620, 7555, 12088, 13240, 15110, 30220, 60440, 500141, 1000282, 2000564, 2500705, 4001128, 5001410, 10002820, 20005640]

約数ペア:

[(1, 20005640), (2, 10002820), (4, 5001410), (5, 4001128), (8, 2500705), (10, 2000564), (20, 1000282), (40, 500141), (331, 60440), (662, 30220), (1324, 15110), (1511, 13240), (1655, 12088), (2648, 7555), (3022, 6620), (3310, 6044)]