21371644

素因数分解:

$2^2\times 7^3\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:483

約数の個数: 48

約数和(自身を含む): 44900800

約数和(自身を除く): 23529156

約数列:

[1, 2, 4, 7, 14, 28, 37, 49, 74, 98, 148, 196, 259, 343, 421, 518, 686, 842, 1036, 1372, 1684, 1813, 2947, 3626, 5894, 7252, 11788, 12691, 15577, 20629, 25382, 31154, 41258, 50764, 62308, 82516, 109039, 144403, 218078, 288806, 436156, 577612, 763273, 1526546, 3053092, 5342911, 10685822, 21371644]

約数ペア:

[(1, 21371644), (2, 10685822), (4, 5342911), (7, 3053092), (14, 1526546), (28, 763273), (37, 577612), (49, 436156), (74, 288806), (98, 218078), (148, 144403), (196, 109039), (259, 82516), (343, 62308), (421, 50764), (518, 41258), (686, 31154), (842, 25382), (1036, 20629), (1372, 15577), (1684, 12691), (1813, 11788), (2947, 7252), (3626, 5894)]