19766740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{521}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 47706624

約数和(自身を除く): 27939884

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 271, 521, 542, 1042, 1084, 1355, 1897, 2084, 2605, 2710, 3647, 3794, 5210, 5420, 7294, 7588, 9485, 10420, 14588, 18235, 18970, 36470, 37940, 72940, 141191, 282382, 564764, 705955, 988337, 1411910, 1976674, 2823820, 3953348, 4941685, 9883370, 19766740]

約数ペア:

[(1, 19766740), (2, 9883370), (4, 4941685), (5, 3953348), (7, 2823820), (10, 1976674), (14, 1411910), (20, 988337), (28, 705955), (35, 564764), (70, 282382), (140, 141191), (271, 72940), (521, 37940), (542, 36470), (1042, 18970), (1084, 18235), (1355, 14588), (1897, 10420), (2084, 9485), (2605, 7588), (2710, 7294), (3647, 5420), (3794, 5210)]