289840

素因数分解:

$2^4\times 5^1\times {\mathrm{3623}}^1$

素因数の和:3636

約数の個数: 20

約数和(自身を含む): 674064

約数和(自身を除く): 384224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3623, 7246, 14492, 18115, 28984, 36230, 57968, 72460, 144920, 289840]

約数ペア:

[(1, 289840), (2, 144920), (4, 72460), (5, 57968), (8, 36230), (10, 28984), (16, 18115), (20, 14492), (40, 7246), (80, 3623)]