20591055

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 37346400

約数和(自身を除く): 16755345

約数列:

[1, 3, 5, 9, 15, 37, 45, 83, 111, 149, 185, 249, 333, 415, 447, 555, 745, 747, 1245, 1341, 1665, 2235, 3071, 3735, 5513, 6705, 9213, 12367, 15355, 16539, 27565, 27639, 37101, 46065, 49617, 61835, 82695, 111303, 138195, 185505, 248085, 457579, 556515, 1372737, 2287895, 4118211, 6863685, 20591055]

約数ペア:

[(1, 20591055), (3, 6863685), (5, 4118211), (9, 2287895), (15, 1372737), (37, 556515), (45, 457579), (83, 248085), (111, 185505), (149, 138195), (185, 111303), (249, 82695), (333, 61835), (415, 49617), (447, 46065), (555, 37101), (745, 27639), (747, 27565), (1245, 16539), (1341, 15355), (1665, 12367), (2235, 9213), (3071, 6705), (3735, 5513)]