20778460

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 45926496

約数和(自身を除く): 25148036

約数列:

[1, 2, 4, 5, 10, 20, 37, 43, 74, 86, 148, 172, 185, 215, 370, 430, 653, 740, 860, 1306, 1591, 2612, 3182, 3265, 6364, 6530, 7955, 13060, 15910, 24161, 28079, 31820, 48322, 56158, 96644, 112316, 120805, 140395, 241610, 280790, 483220, 561580, 1038923, 2077846, 4155692, 5194615, 10389230, 20778460]

約数ペア:

[(1, 20778460), (2, 10389230), (4, 5194615), (5, 4155692), (10, 2077846), (20, 1038923), (37, 561580), (43, 483220), (74, 280790), (86, 241610), (148, 140395), (172, 120805), (185, 112316), (215, 96644), (370, 56158), (430, 48322), (653, 31820), (740, 28079), (860, 24161), (1306, 15910), (1591, 13060), (2612, 7955), (3182, 6530), (3265, 6364)]