19985980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{142757}}^1$

素因数の和:142773

約数の個数: 24

約数和(自身を含む): 47966688

約数和(自身を除く): 27980708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 142757, 285514, 571028, 713785, 999299, 1427570, 1998598, 2855140, 3997196, 4996495, 9992990, 19985980]

約数ペア:

[(1, 19985980), (2, 9992990), (4, 4996495), (5, 3997196), (7, 2855140), (10, 1998598), (14, 1427570), (20, 999299), (28, 713785), (35, 571028), (70, 285514), (140, 142757)]