21377800

素因数分解:

$2^3\times 5^2\times {\mathrm{89}}^1\times {\mathrm{1201}}^1$

素因数の和:1306

約数の個数: 48

約数和(自身を含む): 50303700

約数和(自身を除く): 28925900

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 178, 200, 356, 445, 712, 890, 1201, 1780, 2225, 2402, 3560, 4450, 4804, 6005, 8900, 9608, 12010, 17800, 24020, 30025, 48040, 60050, 106889, 120100, 213778, 240200, 427556, 534445, 855112, 1068890, 2137780, 2672225, 4275560, 5344450, 10688900, 21377800]

約数ペア:

[(1, 21377800), (2, 10688900), (4, 5344450), (5, 4275560), (8, 2672225), (10, 2137780), (20, 1068890), (25, 855112), (40, 534445), (50, 427556), (89, 240200), (100, 213778), (178, 120100), (200, 106889), (356, 60050), (445, 48040), (712, 30025), (890, 24020), (1201, 17800), (1780, 12010), (2225, 9608), (2402, 8900), (3560, 6005), (4450, 4804)]