18891140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10613}}^1$

素因数の和:10711

約数の個数: 24

約数和(自身を含む): 40120920

約数和(自身を除く): 21229780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10613, 21226, 42452, 53065, 106130, 212260, 944557, 1889114, 3778228, 4722785, 9445570, 18891140]

約数ペア:

[(1, 18891140), (2, 9445570), (4, 4722785), (5, 3778228), (10, 1889114), (20, 944557), (89, 212260), (178, 106130), (356, 53065), (445, 42452), (890, 21226), (1780, 10613)]