20878620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49711}}^1$

素因数の和:49730

約数の個数: 48

約数和(自身を含む): 66812928

約数和(自身を除く): 45934308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49711, 99422, 149133, 198844, 248555, 298266, 347977, 497110, 596532, 695954, 745665, 994220, 1043931, 1391908, 1491330, 1739885, 2087862, 2982660, 3479770, 4175724, 5219655, 6959540, 10439310, 20878620]

約数ペア:

[(1, 20878620), (2, 10439310), (3, 6959540), (4, 5219655), (5, 4175724), (6, 3479770), (7, 2982660), (10, 2087862), (12, 1739885), (14, 1491330), (15, 1391908), (20, 1043931), (21, 994220), (28, 745665), (30, 695954), (35, 596532), (42, 497110), (60, 347977), (70, 298266), (84, 248555), (105, 198844), (140, 149133), (210, 99422), (420, 49711)]