18980140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10663}}^1$

素因数の和:10761

約数の個数: 24

約数和(自身を含む): 40309920

約数和(自身を除く): 21329780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10663, 21326, 42652, 53315, 106630, 213260, 949007, 1898014, 3796028, 4745035, 9490070, 18980140]

約数ペア:

[(1, 18980140), (2, 9490070), (4, 4745035), (5, 3796028), (10, 1898014), (20, 949007), (89, 213260), (178, 106630), (356, 53315), (445, 42652), (890, 21326), (1780, 10663)]