19801740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47147}}^1$

素因数の和:47166

約数の個数: 48

約数和(自身を含む): 63366912

約数和(自身を除く): 43565172

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, 47147, 94294, 141441, 188588, 235735, 282882, 330029, 471470, 565764, 660058, 707205, 942940, 990087, 1320116, 1414410, 1650145, 1980174, 2828820, 3300290, 3960348, 4950435, 6600580, 9900870, 19801740]

約数ペア:

[(1, 19801740), (2, 9900870), (3, 6600580), (4, 4950435), (5, 3960348), (6, 3300290), (7, 2828820), (10, 1980174), (12, 1650145), (14, 1414410), (15, 1320116), (20, 990087), (21, 942940), (28, 707205), (30, 660058), (35, 565764), (42, 471470), (60, 330029), (70, 282882), (84, 235735), (105, 188588), (140, 141441), (210, 94294), (420, 47147)]