20989945

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{709}}^1$

素因数の和:936

約数の個数: 16

約数和(自身を含む): 26173440

約数和(自身を除く): 5183495

約数列:

[1, 5, 31, 155, 191, 709, 955, 3545, 5921, 21979, 29605, 109895, 135419, 677095, 4197989, 20989945]

約数ペア:

[(1, 20989945), (5, 4197989), (31, 677095), (155, 135419), (191, 109895), (709, 29605), (955, 21979), (3545, 5921)]