19997985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2609}}^1$

素因数の和:2697

約数の個数: 32

約数和(自身を含む): 37082880

約数和(自身を除く): 17084895

約数列:

[1, 3, 5, 7, 15, 21, 35, 73, 105, 219, 365, 511, 1095, 1533, 2555, 2609, 7665, 7827, 13045, 18263, 39135, 54789, 91315, 190457, 273945, 571371, 952285, 1333199, 2856855, 3999597, 6665995, 19997985]

約数ペア:

[(1, 19997985), (3, 6665995), (5, 3999597), (7, 2856855), (15, 1333199), (21, 952285), (35, 571371), (73, 273945), (105, 190457), (219, 91315), (365, 54789), (511, 39135), (1095, 18263), (1533, 13045), (2555, 7827), (2609, 7665)]