20498120

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2683}}^1$

素因数の和:2885

約数の個数: 32

約数和(自身を含む): 46379520

約数和(自身を除く): 25881400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 2683, 3820, 5366, 7640, 10732, 13415, 21464, 26830, 53660, 107320, 512453, 1024906, 2049812, 2562265, 4099624, 5124530, 10249060, 20498120]

約数ペア:

[(1, 20498120), (2, 10249060), (4, 5124530), (5, 4099624), (8, 2562265), (10, 2049812), (20, 1024906), (40, 512453), (191, 107320), (382, 53660), (764, 26830), (955, 21464), (1528, 13415), (1910, 10732), (2683, 7640), (3820, 5366)]