289867220

素因数分解:

$2^2\times 5^1\times {\mathrm{1621}}^1\times {\mathrm{8941}}^1$

素因数の和:10571

約数の個数: 24

約数和(自身を含む): 609164808

約数和(自身を除く): 319297588

約数列:

[1, 2, 4, 5, 10, 20, 1621, 3242, 6484, 8105, 8941, 16210, 17882, 32420, 35764, 44705, 89410, 178820, 14493361, 28986722, 57973444, 72466805, 144933610, 289867220]

約数ペア:

[(1, 289867220), (2, 144933610), (4, 72466805), (5, 57973444), (10, 28986722), (20, 14493361), (1621, 178820), (3242, 89410), (6484, 44705), (8105, 35764), (8941, 32420), (16210, 17882)]