21570556

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{443}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 45351936

約数和(自身を除く): 23781380

約数列:

[1, 2, 4, 7, 14, 28, 37, 47, 74, 94, 148, 188, 259, 329, 443, 518, 658, 886, 1036, 1316, 1739, 1772, 3101, 3478, 6202, 6956, 12173, 12404, 16391, 20821, 24346, 32782, 41642, 48692, 65564, 83284, 114737, 145747, 229474, 291494, 458948, 582988, 770377, 1540754, 3081508, 5392639, 10785278, 21570556]

約数ペア:

[(1, 21570556), (2, 10785278), (4, 5392639), (7, 3081508), (14, 1540754), (28, 770377), (37, 582988), (47, 458948), (74, 291494), (94, 229474), (148, 145747), (188, 114737), (259, 83284), (329, 65564), (443, 48692), (518, 41642), (658, 32782), (886, 24346), (1036, 20821), (1316, 16391), (1739, 12404), (1772, 12173), (3101, 6956), (3478, 6202)]