1640691860

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{921737}}^1$

素因数の和:921835

約数の個数: 24

約数和(自身を含む): 3484169640

約数和(自身を除く): 1843477780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 921737, 1843474, 3686948, 4608685, 9217370, 18434740, 82034593, 164069186, 328138372, 410172965, 820345930, 1640691860]

約数ペア:

[(1, 1640691860), (2, 820345930), (4, 410172965), (5, 328138372), (10, 164069186), (20, 82034593), (89, 18434740), (178, 9217370), (356, 4608685), (445, 3686948), (890, 1843474), (1780, 921737)]