20256400

素因数分解:

$2^4\times 5^2\times {\mathrm{89}}^1\times {\mathrm{569}}^1$

素因数の和:676

約数の個数: 60

約数和(自身を含む): 49299300

約数和(自身を除く): 29042900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 89, 100, 178, 200, 356, 400, 445, 569, 712, 890, 1138, 1424, 1780, 2225, 2276, 2845, 3560, 4450, 4552, 5690, 7120, 8900, 9104, 11380, 14225, 17800, 22760, 28450, 35600, 45520, 50641, 56900, 101282, 113800, 202564, 227600, 253205, 405128, 506410, 810256, 1012820, 1266025, 2025640, 2532050, 4051280, 5064100, 10128200, 20256400]

約数ペア:

[(1, 20256400), (2, 10128200), (4, 5064100), (5, 4051280), (8, 2532050), (10, 2025640), (16, 1266025), (20, 1012820), (25, 810256), (40, 506410), (50, 405128), (80, 253205), (89, 227600), (100, 202564), (178, 113800), (200, 101282), (356, 56900), (400, 50641), (445, 45520), (569, 35600), (712, 28450), (890, 22760), (1138, 17800), (1424, 14225), (1780, 11380), (2225, 9104), (2276, 8900), (2845, 7120), (3560, 5690), (4450, 4552)]