20988885

素因数分解:

$3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{9391}}^1$

素因数の和:9548

約数の個数: 16

約数和(自身を含む): 33811200

約数和(自身を除く): 12822315

約数列:

[1, 3, 5, 15, 149, 447, 745, 2235, 9391, 28173, 46955, 140865, 1399259, 4197777, 6996295, 20988885]

約数ペア:

[(1, 20988885), (3, 6996295), (5, 4197777), (15, 1399259), (149, 140865), (447, 46955), (745, 28173), (2235, 9391)]