21656419280

素因数分解:

$2^4\times 5^1\times {\mathrm{13913}}^1\times {\mathrm{19457}}^1$

素因数の和:33383

約数の個数: 40

約数和(自身を含む): 50357381832

約数和(自身を除く): 28700962552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 13913, 19457, 27826, 38914, 55652, 69565, 77828, 97285, 111304, 139130, 155656, 194570, 222608, 278260, 311312, 389140, 556520, 778280, 1113040, 1556560, 270705241, 541410482, 1082820964, 1353526205, 2165641928, 2707052410, 4331283856, 5414104820, 10828209640, 21656419280]

約数ペア:

[(1, 21656419280), (2, 10828209640), (4, 5414104820), (5, 4331283856), (8, 2707052410), (10, 2165641928), (16, 1353526205), (20, 1082820964), (40, 541410482), (80, 270705241), (13913, 1556560), (19457, 1113040), (27826, 778280), (38914, 556520), (55652, 389140), (69565, 311312), (77828, 278260), (97285, 222608), (111304, 194570), (139130, 155656)]