20441800

素因数分解:

$2^3\times 5^2\times {\mathrm{179}}^1\times {\mathrm{571}}^1$

素因数の和:766

約数の個数: 48

約数和(自身を含む): 47876400

約数和(自身を除く): 27434600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 179, 200, 358, 571, 716, 895, 1142, 1432, 1790, 2284, 2855, 3580, 4475, 4568, 5710, 7160, 8950, 11420, 14275, 17900, 22840, 28550, 35800, 57100, 102209, 114200, 204418, 408836, 511045, 817672, 1022090, 2044180, 2555225, 4088360, 5110450, 10220900, 20441800]

約数ペア:

[(1, 20441800), (2, 10220900), (4, 5110450), (5, 4088360), (8, 2555225), (10, 2044180), (20, 1022090), (25, 817672), (40, 511045), (50, 408836), (100, 204418), (179, 114200), (200, 102209), (358, 57100), (571, 35800), (716, 28550), (895, 22840), (1142, 17900), (1432, 14275), (1790, 11420), (2284, 8950), (2855, 7160), (3580, 5710), (4475, 4568)]