21138800

素因数分解:

$2^4\times 5^2\times {\mathrm{43}}^1\times {\mathrm{1229}}^1$

素因数の和:1290

約数の個数: 60

約数和(自身を含む): 52009320

約数和(自身を除く): 30870520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 50, 80, 86, 100, 172, 200, 215, 344, 400, 430, 688, 860, 1075, 1229, 1720, 2150, 2458, 3440, 4300, 4916, 6145, 8600, 9832, 12290, 17200, 19664, 24580, 30725, 49160, 52847, 61450, 98320, 105694, 122900, 211388, 245800, 264235, 422776, 491600, 528470, 845552, 1056940, 1321175, 2113880, 2642350, 4227760, 5284700, 10569400, 21138800]

約数ペア:

[(1, 21138800), (2, 10569400), (4, 5284700), (5, 4227760), (8, 2642350), (10, 2113880), (16, 1321175), (20, 1056940), (25, 845552), (40, 528470), (43, 491600), (50, 422776), (80, 264235), (86, 245800), (100, 211388), (172, 122900), (200, 105694), (215, 98320), (344, 61450), (400, 52847), (430, 49160), (688, 30725), (860, 24580), (1075, 19664), (1229, 17200), (1720, 12290), (2150, 9832), (2458, 8600), (3440, 6145), (4300, 4916)]