21457900

素因数分解:

$2^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{2411}}^1$

素因数の和:2514

約数の個数: 36

約数和(自身を含む): 47106360

約数和(自身を除く): 25648460

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 178, 356, 445, 890, 1780, 2225, 2411, 4450, 4822, 8900, 9644, 12055, 24110, 48220, 60275, 120550, 214579, 241100, 429158, 858316, 1072895, 2145790, 4291580, 5364475, 10728950, 21457900]

約数ペア:

[(1, 21457900), (2, 10728950), (4, 5364475), (5, 4291580), (10, 2145790), (20, 1072895), (25, 858316), (50, 429158), (89, 241100), (100, 214579), (178, 120550), (356, 60275), (445, 48220), (890, 24110), (1780, 12055), (2225, 9644), (2411, 8900), (4450, 4822)]