19639915

素因数分解:

$5^1\times {\mathrm{127}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:486

約数の個数: 16

約数和(自身を含む): 24026112

約数和(自身を除く): 4386197

約数列:

[1, 5, 127, 157, 197, 635, 785, 985, 19939, 25019, 30929, 99695, 125095, 154645, 3927983, 19639915]

約数ペア:

[(1, 19639915), (5, 3927983), (127, 154645), (157, 125095), (197, 99695), (635, 30929), (785, 25019), (985, 19939)]